class 9 assignment solution 9th week

Class 9 9th Week Assignment 2021 Question & Solution

Assignments for the 9th week of 6 to class 9 have been published. It’s time to do the 9th week of class 9 assignments. For class 9 students, 6 subject assignments have to be completed in the 9th week. However, not all subjects are compulsory for all students. There are separate subjects for science, humanities and business. 

There are two science subjects among class 9 students. One is physics and the other is biology. Finance and Banking and Accounting for Commerce students. Civics for humanities students. There is also a compulsory for students of all departments. Compulsory subject for all is the history and world civilization of Bangladesh.

Today we will discuss the solution of all the subjects of the 9th week of class 9. As always, we will create solutions for different assignments of all classes in all subjects. There will also be discussions on how to create your own assignment solutions on each topic. So the solution of assignment on any subject of 9th week of class 9 can be found on our website. We also provide a solution to any queries regarding assignments. So those who are looking for a solution for class 9 9th week assignments please follow our website.

Class 9 9th week assignment solution

Six assignments need to be completed for class 9 students in the 9th week. The subjects of the assignment are Physics, Biology, Accounting, Finance and Banking, History and World Civilization of Bangladesh and Politics and Citizenship. The main purpose of today’s article is to discuss how to solve these six assignments.

The solution of the assignment of all the subjects of the  class 9 of the 9th week will be published. There will also be instructions on how to solve the assignments. So all the Class 9 students who are worried about the solution of the assignment should read our article. As soon as you read this article, you will understand how the 9th week assignments of class 9 can be solved in a good way.

Class 9 9th Week Physics Assignment

This is the second scheduled work in the 9th week of physics class 9. The second determining assignment has been questioned from the first chapter of the physics subject. The title of the first chapter of the class 9 physics world is Physical Quantities and Measurements. That is, the physical amount of the assignment and various measurements will be discussed. From the chapter in question, knowledge will be gained about the scope of physics, contribution of different races or religious groups, purpose of physics, unit of measurement, scale, error of measurement etc.

Get Class 9 9th Week Physics Assignment Answer

However, the 9th week of class 9 has a core assignment of physics assignments. The assignment is to write a report on how the evolution of physics has taken place. Thus the main task of the assignment is to create a report by gaining knowledge about the physical subject and the subject determined from the measurement in the first chapter.

In order to solve the 9th week physics subject assignment, we have to follow some instructions. First of all, you have to read all the subject matter from the prescribed chapter very well. You don’t just have to read, you have to acquire knowledge from there. Because the subject of physics is extremely complex. No knowledge can be gained from memorizing without understanding. So you have to understand the content well and complete the assigned work of the assignment.

Data can be collected from textbook science periodicals on the internet to complete the assignment. Full consistency and accurate information should be provided while preparing the assignment report. Presentation of information must be applied properly. And the presentation must also maintain individuality.

Class 9 Accounting 9th week  Assignment

The class 9 accounting is taken from the second chapter. The title of the second chapter is – Transactions. In order to complete the accounting assignment, students need to understand a few topics very well. To solve the assignment, two questions have to be answered as the assigned task. In order to answer these two questions, it is very important to have a very good knowledge of the five topics.

Get Class 9 9th Week Accounting Assignment Answer

The topics are the concept of the transaction, the nature of the transaction, the identification of the transaction, the accounting equation, the source of the business transaction and the related documents. In order to answer the two questions very well, the above issues have to be done very well. Here two questions need to be solved as an assignment of accounting subject. The first question is to create three hypothetical transactions and present an effect of accounting equations referring to the accounting sector.

The second question is to mention five transactions in your family and five non-transactions. So it goes without saying that answering two questions about accounting is not a very difficult subject. It would be nice if anyone could look at the contents of the assignment very well and then answer. Here are some guidelines for completing the assignment.

Get ideas about relevant topics in the textbook to solve assignments in accounting subjects. If necessary, seek the help of the teacher through mobile media. Parental assistance can be taken. A variety of suggestions can also be obtained from Google YouTube via the Internet.

Another thing is, if necessary or possible, you can take the help of 11th-12th class accounting books. Hopefully, if you can understand the content and present each transaction properly, it is possible to achieve good results from the assignment.

Class 9 Bangladesh History and World Civilization 9th Week Assignment

This is the second work of the 9th week class 9 history and world civilization assignment of Bangladesh. Chapter 2: Assignments from World Civilization. A closer look at the second chapter reveals an important civilization. The civilizations are the Egyptian civilization, the Indus civilization, the Greek civilization and the Roman civilization. The content of the assignment is based on these four civilizations. So to solve that assignment, you need to know about these four civilizations. We also hope that good results can be achieved by following the guidelines that we will provide.

Get Class 9 9th Week History Assignment Answer

The assigned task of the assignment is to produce a report entitled The Role of Greek and Roman Civilization in the Development of World Civilization. So in order to create a solution to this question we only need to have a good knowledge or idea about Greek and Roman civilization. The report should end in 250 to 300 words. Thus the essence of Greek and Roman civilization can be summarized. Because if you answer the question in detail, the answer can become much bigger.

With the help of various websites from the internet including Wikipedia to complete the assignment, it will be less difficult to create answers. Images from two civilizations can be added to standardize the answer to the question. Various magazines or books can be used on the internet to collect pictures.

There are a few things to keep in mind when creating a report. Content must be accurate and consistent. The information should be consistent with the content. Significant levels of individuality and creativity must be used.

Class 9 Biology 9th Week Assignment

Get Class 9 9th Week Biology Assignment Answer

Class 9 9th Week Civics Assignment

Get Class 9 9th Week Civics Assignment Answer

Class 9 9th Week Finance and Banking Assignment

Get Class 9 9th Week Finance and Banking Assignment Answer

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NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12

NCERT Solutions for Class 9

January 18, 2024 by phani

Get NCERT solutions for class 9 for all subjects: Maths, Science, Social Science, English & Hindi. We provide chapter-wise NCERT Solutions for class 9 for all NCERT books. NCERT Solutions for class 9 provide you with a quick way to complete your homework. All solutions are prepared by experts and easy-to-understand. So, whenever you need to complete your homework, prepare for exam or do a quick revision just use our NCERT solutions for class 9 and be assured for academic success. For quick access you can bookmark this page and use it whenever you need it. Do share NCERT solutions for class 9 with your friends to and help them with their homework and exam needs.

• NCERT Solutions for Class 9 Maths
• CBSE Sample Papers for Class 9
• NCERT Solutions for Class 9 Science
• NCERT Solutions for Class 9 Social Science
• NCERT Solutions for Class 9 Social Science Geography
• NCERT Solutions for Class 9 Social Science History
• NCERT Solutions for Class 9 Social Science Civics
• NCERT Solutions for Class 9 Social Science Economics
• NCERT Solutions for Class 9 English Moments
• NCERT Solutions for Class 9 English Beehive
• NCERT Solutions for Class 9 English Main Course
• NCERT Solutions for Class 9 English Literature Reader
• NCERT Solutions for Class 9 Hindi Sparsh
• NCERT Solutions for Class 9 Hindi Sanchayan
• NCERT Solutions for Class 9 Hindi Kritika
• NCERT Solutions for Class 9 Hindi kshitiz
• NCERT Solutions for Class 9 Sanskrit
• NCERT Solutions for Class 9 Foundation of Information Technology

CBSE Class 9 study materials are provided here for free in PDF format for all the students. The materials given here are for Maths, Science, Social Science, English, and Hindi subjects and can be easily downloaded. LearnCBSE is providing here all the learning materials such as NCERT chapter wise solutions, revision notes, important questions, syllabus, previous year question papers and sample papers. All these materials are designed by experts and under the CBSE guidelines. Students of 9th standard can prepare for exams using these materials and score good marks.

Class 9th is an important standard, where new concepts are introduced for Maths and Science subjects. All these concepts are explained elaborately in these learning materials to help students understand better and perform well in their final examinations. The solutions will provide the best methods to solve the problems and the sample papers could be used to understand the paper pattern and marking scheme in the exams. By solving important questions students can cover most of the important topics. Also, the latest syllabus has been provided here to tally the topics which are covered in 9th grade and prepare accordingly.

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NCERT Solutions For class 9 Maths

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NCERT Solutions for Class 9 Maths - Free PDF Download

Class 9 Maths is an important subject to master for students. In this class, they are introduced to concepts of Triangles, Polynomials, Number Systems, and much more. Also, the exercise questions are challenging, and thus we suggest the students to take guidance from reliable sources to prepare for the Class 9 Maths exam. In order to complete the vast syllabus in an easy and efficient way, Vedantu experts have compiled NCERT Class 9 Math Solution for students. These study materials act as guides that can help them progress in class. Students should download class 9th maths NCERT solutions PDF, for their preparation.

NCERT Solutions for Class 9 Maths - Chapter-wise List

Given below are the chapter-wise NCERT Solutions for Class 9 Maths . Go through these  9th maths solutions chapter-wise to be thoroughly familiar with the concepts.

Note: The chapters on Areas of Parallelograms and Triangles , Constructions and  Probability have been excluded from the Class 9 Maths textbook for the 2024-25 academic year

Also Check for: The Concepts of NCERT Class 9 Maths

Glance on NCERT Solutions Class 9 Maths

NCERT Solutions for Class 9 Maths for all the chapters and exercises from Chapters 1 to 12 are provided.

Practising the textbook questions using these solutions can help students analyse their level of preparation and understanding of concepts.

Covering chapters like Number Systems, Algebraic Expressions, Linear Equations in Two Variables, Geometry, and Statistics.

The link also provides details about the exam pattern, marks weightage, and question paper design for CBSE Class 9 Maths.

This article also provides resources such as NCERT notes, important questions, exemplar solutions, RD Sharma, and RS Aggarwal solutions PDF for further reference.

NCERT Solutions for Class 9 Maths Chapter Details, Formulas and Exercises PDF

Chapter 1 - number system.

NCERT Class 9 Maths Chapter 1 sets the foundation for the subject. Solutions of text exercises and end exercise of Number are explained elaborately, to help understand the basic concepts. The chapter discusses the topics of rational, irrational numbers and representing the same on the number line. Students are also taught how to represent square roots, as well as terminating and non-terminating decimals on the number lines.

Exercise 1.1: Deals with basic classification of numbers. You might be asked to identify different types of numbers (natural, whole, integers, rational, irrational) from a given set.

Exercise 1.2: This exercise could involve applying properties of operations (addition, subtraction, multiplication, division) to various number systems. You might be asked to check if a specific property holds true for a particular operation on a given set of numbers.

Exercise 1.3: Here, the focus might be on representing numbers on the number line. You could be solving problems that involve plotting numbers, finding the distance between two numbers, or comparing their relative positions.

Exercise 1.4: This exercise might delve deeper into specific number systems. You could encounter questions related to properties of even and odd numbers, divisibility rules, or operations on fractions/decimals.

Exercise 1.5: Here, you might be challenged with problems that involve comparing and ordering numbers of different types (e.g., rational vs. irrational).

Exercise 1.6: This exercise could be a mix of concepts covered earlier. You might be presented with a scenario that requires applying various aspects of number systems and their properties to solve it.

In Class 9 Maths Chapter 1 on Number System, we cover the following:

Different Number Systems : natural, whole, integers, rational, irrational

Properties of operations (addition, subtraction, multiplication, division) on these systems

Representing numbers on the number line

Relating terminating/non-terminating recurring decimals to rational numbers

Understanding irrational numbers (e.g., √2, √3)

Every real number has a unique position on the number line (and vice versa)

Introduction to √x for positive real numbers

Brief review of exponent laws (integral & rational powers)

Brief introduction to rationalizing numbers

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 1 of CBSE Class 9 Maths Solutions–

Number System Important Questions

Number System Important Formulas

Number System Revision Notes

Number System NCERT Exemplar Solutions

Number System RD Sharma Solutions

Number Systems RS Aggarwal Solutions

Chapter 2 - Polynomials

Chapter 2 of NCERT Solutions of Class 9 Maths is on Polynomials . Students are introduced to the concept of Polynomials, which are expressions consisting of variables and coefficients. Properties such as addition, subtraction, division, multiplication of polynomials are taught in this chapter along with their factorisation. The Factor Theorem and Remainder Theorem making use of these polynomials are also provided in this chapter.

Exercise 2.1: This exercise deals with identifying basic components of polynomials. You'll practice recognizing terms, coefficients, variables, and the degree of a polynomial expression.

Exercise 2.2: Here, the focus is on classifying polynomials based on their degree. You might be asked to identify polynomials as linear, quadratic, cubic, etc., based on the highest exponent of the variable.

Exercise 2.3: This exercise involves recognizing zeroes (or roots) of a polynomial. You might be presented with a polynomial equation and asked to find the values of the variable that make the equation true (where the expression evaluates to zero).

Exercise 2.4: This exercise covers on the Factor Theorem. This theorem relates the factors of a polynomial to its zeroes. You might be challenged with problems that involve finding factors based on zeroes or vice versa.

Exercise 2.5: This exercise introduces basic algebraic identities. These are equalities that hold true for all permissible values of the variables involved. You might be asked to prove or use such identities for simplification.

In Class 9 Maths Chapter 2 on Polynomials, we cover the following:

Explanation of a polynomial with one variable, its coefficients, along with examples and non-examples, its terms, and the zero polynomial.

Understanding the degree of a polynomial and types like constant, linear, quadratic, cubic polynomials; also monomials, binomials, and trinomials.

Concepts of factors, multiples, and zeros/roots of a polynomial/equation.

Introduction and rationale of the Remainder Theorem, with examples and comparisons to integers. Also, the statement and proof of the Factor Theorem.

Techniques for factorization of expressions like ax 2 + bx + c, a ≠ 0 where a, b, c are real numbers, and of cubic polynomials using the Factor Theorem.

Definitions of the Remainder Theorem and the Factor Theorem.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 2 of CBSE Class 9 Maths Solutions–

Polynomials Important Questions

Polynomials Important Formulas

Polynomials Revision Notes

Polynomials NCERT Exemplar Solution

Polynomials RS Aggarwal Solutions

Chapter 3 - Coordinate Geometry

Chapter 3 discusses the cartesian plane, coordinates of a point in the ‘xy’ plane, and several other significant terms associated with coordinate geometry. Students will learn how to plot points in the xy plane following the abscissa and ordinates, etc. With 3 exercises comprising both long and short questions, the exercises of NCERT Class 9 Solutions Maths for Chapter 3 are designed to test your application skills as well as cognizance.

Exercise 3.1: This exercise likely deals with the foundational concepts. You might be asked to explain how to describe the location of a point on a flat surface (like your desk) using coordinates. This involves understanding how perpendicular axes (X and Y) help pinpoint a position.

Exercise 3.2: Here, the focus is on translating coordinates into a visual representation. You'll probably practice plotting points on a graph based on their given coordinates (X and Y values).

Exercise 3.3: This exercise flips the script. You might be given a graph with points plotted and asked to determine their corresponding coordinates based on their position on the axes.

In Class 9 Maths Chapter 3 on Coordinate Geometry, we cover the following:

The Cartesian Plane : A plane with a horizontal axis (x-axis) and a vertical axis (y-axis) that intersect at the origin (0,0).

Coordinates of a Point : Each point on the Cartesian plane is defined by an ordered pair (𝑥,𝑦), representing its position along the x-axis and y-axis.

Names and Terms Associated with the Coordinate Plane : Terminology includes terms like origin, quadrants, axes, and coordinate points.

Notations Used in Coordinate Geometry : Symbols and notations such as ( x , y ) for points, and 𝑂 for the origin.

Plotting Points on the Plane : The process of marking points on the Cartesian plane based on their coordinates (𝑥,𝑦)

Graph of Linear Equations with Examples : Representation of linear equations on the Cartesian plane, typically resulting in a straight line.

Focusing on Linear Equations of the Form ax + by + c =0 : Understanding and simplifying linear equations to the slope-intercept form 𝑦=𝑚𝑥+𝑐

Linking with the Chapter on Linear Equations in Two Variables : Connecting concepts from coordinate geometry with those from the study of linear equations involving two variables.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 3 of CBSE Class 9 Maths Solutions–

Coordinate Geometry Important Questions

Coordinate Geometry Important Formulas

Coordinate Geometry Revision Notes

Coordinate Geometry RD Sharma Solutions

Coordinate Geometry RS Aggarwal Solutions

NCERT Solutions for Class 9 Maths Chapter 4 Linear Equations in Two Variables

Chapter 4 also discusses the concept of linear equations having two variables. Students already equipped with the knowledge of coordinate geometry will learn how to plot the graph of a linear equation with two variables.

NCERT 9th class Maths book solutions include 4 exercises with 16 questions in total. This chapter includes application-based questions to test your understanding of the chapter.

Exercise 4.1: This exercise focuses on writing linear equations in two variables. You'll likely be given worded problems describing relationships between two variables and asked to translate them into mathematical equations.

Exercise 4.2: Here, you'll practice solving linear equations in two variables. The problems might involve finding the values of the variables (x and y) that satisfy the given equation.

Exercise 4.3: This exercise introduces the concept of graphical representation of linear equations. You'll probably be asked to graph the solutions of the equations you practised solving in Exercise 4.2. This will help you visualize the relationship between the variables.

Exercise 4.4: This exercise builds on your understanding from Exercise 4.3. You might be given the graph of a linear equation and asked to interpret it, write the corresponding equation, or answer questions based on the visual representation.

In Class 9 Maths Chapter 4 on Linear Equations in Two Variables, we cover the following:

Review of linear equations in one variable.

Introduction to equations involving two variables.

Demonstration that a linear equation in two variables has infinitely many solutions, represented as ordered pairs of real numbers.

Plotting these solutions to show they form a straight line.

Real-life examples and problems, including those on ratio and proportion, with both algebraic and graphical solutions presented simultaneously.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 4 of CBSE Class 9 Maths Solutions–

Linear Equations in Two Variables Important Questions

Linear Equations in Two Variables Important Formulas

Linear Equations in Two Variables Revision Notes

Linear Equations in Two Variables NCERT Exemplar Solutions

Linear Equations in Two Variables RD Sharma Solutions

Linear Equations in Two Variables RS Aggarwal Solutions

Chapter 5 - Introduction to Euclid's Geometry

The 5th Chapter, Introduction to Euclid's Geometry tries to establish a link between present-day geometry with that of Euclidean geometry. The axioms, theorems and postulates have been provided to provide students with an in-depth understanding. Chapter 5 of Class 9 Maths NCERT Solutions has 2 exercises. The questions are based on analysis to test your analytical skills.

Exercise 5.1: This exercise might involve basic definitions and properties of points and lines. You could be asked to identify points and lines in diagrams, understand how many points two lines can intersect, or differentiate between intersecting and parallel lines.

Exercise 5.2: Here, you might encounter proofs related to the properties of points and lines introduced in the chapter. These proofs could involve establishing simple facts using the definitions and axioms presented in Euclid's Geometry.

In Class 9 Maths Chapter 5 on Introduction to Euclid's Geometry, we cover the following:

History – Euclid and the development of geometry in India.

Euclid’s method of transforming observed phenomena into precise mathematics using definitions, common notions, axioms/postulates, and theorems.

The five postulates of Euclid.

Equivalent interpretations of the fifth postulate.

Demonstrating the connection between axioms and theorems.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 5 of CBSE Class 9 Maths Solutions–

Introduction to Euclids Geometry Important Questions

Introduction to Euclids Geometry Important Formulas

Introduction to Euclids Geometry Revision Notes

Introduction to Euclids Geometry NCERT Exemplar Solutions

Introduction to Euclids Geometry RD Sharma Solutions

Introduction to Euclids Geometry RS Aggarwal Solutions

Chapter 6 - Lines and Angles

The 6th chapter in NCERT Solutions Class 9 Maths is on Lines and Angles. Students are mostly asked to prove the statements based on the axioms and theorems explained in the chapter. NCERT Solution Class 9 Maths of Chapter 6 includes 3 exercises.

Exercise 6.1: This exercise likely focuses on finding the measure of unknown angles based on given information. You might encounter problems where you need to use properties of angles (like a straight angle being 180 degrees) or identify special angle pairs (like linear pairs or verticals) to solve for missing angles.

Exercise 6.2: Here, the focus might shift towards introducing transversals and understanding how they interact with parallel lines. You could be solving problems that involve finding corresponding angles, alternate interior angles, or alternate exterior angles formed by a transversal intersecting parallel lines.

Exercise 6.3: This exercise could be a mix of concepts covered in the previous exercises. You might encounter problems that combine finding missing angles, identifying special angle pairs, and applying properties of parallel lines intersected by a transversal.

In Class 9 Maths Chapter 6 on Lines and Angles, we cover the following:

Sum of Adjacent Angles on a Line : If a ray stands on a line, the sum of the two adjacent angles formed is 180°, and vice versa.

Vertically Opposite Angles : If two lines intersect, the vertically opposite angles are equal.

Angles Formed by a Transversal with Parallel Lines : Results on corresponding angles, alternate angles, and interior angles when a transversal intersects two parallel lines.

Parallel Lines : Lines parallel to a given line are also parallel.

Sum of Angles in a Triangle : The sum of the angles in a triangle is 180°.

Exterior Angle of a Triangle : If a side of a triangle is extended, the exterior angle formed is equal to the sum of the two opposite interior angles.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 6 of CBSE Class 9 Maths Solutions

Lines and Angles Important Questions

Lines and Angles Important Formulas

Lines and Angles Revision Notes

Lines and Angles NCERT Exemplar Solutions

Lines and Angles RD Sharma Solutions

Lines and Angles RS Aggarwal Solutions

Chapter 7 - Triangles

Triangles is the 7th Chapter in NCERT Maths Class 9 Solutions. The properties of triangles such as inequalities, congruence, rules of congruence have been explained in this chapter. Students are also taught about the application of the congruence rules while solving the exercise questions. NCERT Solution Class 9 Maths of Chapter 7 includes 5 exercises . These questions are designed to test your skills.

Exercise 7.1: This exercise deals with proving triangles congruent (having exactly the same size and shape) based on given criteria. You'll likely use properties like side-side-side (SSS) or angle-side-angle (ASA) congruence rules.

Exercise 7.2: Here, the focus is on properties of angles in triangles. You might encounter problems that involve finding the relationship between interior angles (angles inside the triangle) and exterior angles (angle formed by one side of the triangle and the extension of the other side).

Exercise 7.3: This exercise introduces the concept of midpoints and perpendicular bisectors (a line segment that bisects a side at a 90-degree angle). You might be asked to prove that a segment joining the midpoints of two sides of a triangle is parallel to the third side and half its length.

Exercise 7.4: This exercise delves into the relationship between side lengths and angles in a triangle. You could be challenged with problems that involve proving that the longest side is opposite the largest angle in a right-angled triangle, or exploring relationships between side lengths in general triangles.

In Class 9 Maths Chapter 7 on Triangles, we cover the following:

SAS Congruence : Two triangles are congruent if two sides and the included angle of one triangle are equal to two sides and the included angle of the other triangle.

ASA Congruence : Two triangles are congruent if two angles and the included side of one triangle are equal to two angles and the included side of the other triangle.

SSS Congruence : Two triangles are congruent if all three sides of one triangle are equal to all three sides of the other triangle.

Congruence in Right Triangles : Two right triangles are congruent if the hypotenuse and one side of one triangle are equal to the hypotenuse and one side of the other triangle.

Angles Opposite Equal Sides : The angles opposite equal sides of a triangle are equal.

Sides Opposite Equal Angles : The sides opposite equal angles of a triangle are equal.

Triangle Inequalities : Triangle inequalities and the relationship between an angle and the side opposite it; inequalities within a triangle.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 7 of CBSE Class 9 Maths Solutions–

Triangles Important Questions

Triangles Important Formulas

Triangles Revision Notes

Triangles NCERT Exemplar Solutions

Chapter 8: Triangles RS Aggarwal Solutions

Chapter 8 - Quadrilaterals

In chapter 8 you will be introduced to Quadrilaterals and their various properties. A quadrilateral is a figure obtained by joining four distinct points on a plane. Students are provided in-depth knowledge about the topic in this chapter.

NCERT Solution Class 9 Maths of Chapter 8 includes 2 exercises. These questions are based on your application skills and analysis skills.

Exercise 8.1: This exercise involves using theorems related to quadrilaterals, especially parallelograms. You might encounter problems that ask you to prove properties of a quadrilateral based on given information about its sides or angles. For instance, you could be asked to show that a quadrilateral with opposite sides equal and parallel is a parallelogram.

Exercise 8.2: Here, the focus shifts towards applying the Mid-Point Theorem. This theorem states that the line segment joining the midpoints of any two sides of a triangle is parallel to the third side and half its length. You might be solving problems that involve using this theorem to prove properties of quadrilaterals or find missing lengths and angles within them.

In Class 9 Maths Chapter 8 on Triangles, we cover the following:

Diagonals of a Parallelogram : The diagonal of a parallelogram divides it into two congruent triangles.

Equality of Opposite Sides in a Parallelogram : In a parallelogram, opposite sides are equal, and vice versa.

Equality of Opposite Angles in a Parallelogram : In a parallelogram, opposite angles are equal, and conversely.

Conditions for a Parallelogram : A quadrilateral is a parallelogram if a pair of its opposite sides are both parallel and equal.

Bisection of Diagonals in a Parallelogram : In a parallelogram, the diagonals bisect each other, and conversely.

Midpoint Theorem in Triangles : The line segment joining the midpoints of any two sides of a triangle is parallel to the third side, and its converse can be motivated.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 8 of CBSE Class 9 Maths Solutions–

Quadrilaterals Important Questions

Quadrilaterals Important Formulas

Quadrilaterals Revision Notes

Quadrilaterals NCERT Exemplar Solutions

Quadrilaterals RD Sharma Solutions

Quadrilaterals RS Aggarwal Solutions

Chapter 9 - Circles

In this chapter of Class 9 Maths, you will learn about circles. Definition of a circle, tangent, chord, arc, etc., are described in this chapter. Various other concepts such as the angle subtended by the arc of a circle, cyclic quadrilaterals, etc., are also explained. 9th class Maths book solutions Chapter 9 includes 6 exercises and solutions to all 35 questions given in your NCERT Textbook. These questions are based on your numerical abilities, application skills, and memory skills.

Exercise 9.1: Deals with theorems about equal chords subtending equal central angles and vice versa (converse). You'll practice identifying these relationships and their implications.

Exercise 9.2: This exercise involves problems applying these central angle and chord relationships to solve for missing measures (angles or chord lengths) based on the given information.

In Class 9 Maths Chapter 9 on Circles, we cover the following:

Defining Circle-related Concepts : Understanding the terms radius, circumference, diameter, chord, arc, and subtended angle through examples.

Equal Chords and Central Angles : Equal chords of a circle subtend equal angles at the centre, and vice versa.

Perpendicular Bisector of a Chord : The perpendicular from the centre of a circle to a chord bisects the chord, and conversely, a line drawn through the centre of a circle to bisect a chord is perpendicular to the chord.

Uniqueness of Circles through Three Points : There is one and only one circle passing through three given non-collinear points.

Equal Chords and Distance from Center: Equal chords of a circle (or of congruent circles) are equidistant from the centre(s), and vice versa.

Angle Subtended by an Arc: The angle subtended by an arc at the centre is double the angle subtended by it at any point on the remaining part of the circle.

Angles in the Same Segment : Angles in the same segment of a circle are equal.

Concyclic Points and Cyclic Quadrilaterals : If a line segment joining two points subtends equal angles at two other points lying on the same side of the line containing the segment, the four points lie on a circle. The sum of either pair of opposite angles of a cyclic quadrilateral is 180°, and vice versa.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 9 of CBSE Class 9 Maths Solutions

Circles Important Questions

Circles Important Formulas

Circles Revision Notes

Circles NCERT Exemplar Solutions

Circles RD Sharma Solutions

Circles RS Aggarwal Solutions

Chapter 10 Heron’s Formula

Heron’s formula, the 10th chapter of Class 9 Maths, is used to calculate the area of a triangle when the lengths of its sides are given. Students are also taught how to calculate the area of quadrilaterals and other polygons by dividing them into triangles and applying Heron’s formula. NCERT Solution Class 9 Maths of Chapter 10 includes 2 exercises designed on your ability to decipher and apply the formula.

Exercise 10.1: This exercise involves practice problems where you'll be given the side lengths of a triangle and asked to find its area using Heron's Formula.

Exercise 10.2: This is a summary or review exercise. It revisits the key points of Heron's Formula, its application, or even ask you to solve problems similar to Exercise 10.1.

In Class 9 Maths Chapter 10 on Heron’s Formula, we cover the following:

Area of a Triangle with Heron’s Formula : Finding the area of a triangle using Heron’s Formula, without going into the proof.

Application in Quadrilaterals : Using Heron’s Formula to find the area of a quadrilateral.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 10 of CBSE Class 9 Maths Solutions

Heron’s Formula Important Questions

Heron’s Formula Important Formulas

Heron’s Formula Revision Notes

Heron’s Formula NCERT Exemplar Solutions

Heron’s Formula RD Sharma Solutions

Chapter 11 - Surface Areas and Volumes

In this chapter, you will understand the significance of surface areas and volumes of cubes, cuboids, cones, etc. This chapter teaches students how to calculate the same. NCERT Solution Class 9 Maths of Chapter 11 includes 9 exercises and these questions will test your understanding ability and memory skills (required to retain the different formulae).

Exercise 11.1: Introduction to finding the curved surface area (CSA) of a cone. You'll be introduced to the relevant formula and practice using it on cones with different measurements.

Exercises 11.2 - 11.5: Further exploration of CSA. These exercises might involve variations like calculating CSA when the slant height or radius is missing, or solving problems with right cones vs. slanted cones.

Exercises 11.6 - 11.8: Shifting focus to total surface area. You'll likely learn the formula for total surface area (TSA) of a cone (CSA + area of the base) and practice applying it to solve problems.

Exercise 11.9: Introduction to volume of a cone. This exercise might involve the formula for the volume of a cone (1/3 * π * r² * h) and solving problems to find the volume based on cone dimensions.

In Class 9 Maths Chapter 11 on Surface Areas and Volumes, we cover the following:

Introduction to Surface Areas and Volumes

Surface Area of a Cuboid and a Cube:

Surface Area of a Right Circular Cylinder

Surface Area of a Right Circular Cone

Surface Area of a Sphere

Volume of a Cuboid

Volume of a Cube

Volume of a Right Circular Cylinder

Volume of a Right Circular Cone

Volume of a Sphere

Surface Areas and Volumes Important Questions

Surface Areas and Volumes Formulas

Surface Areas and Volumes Revision Notes

Surface Areas and Volumes NCERT Exemplar Solutions

NCERT Solutions for Class 9 Maths Chapter 12 Statistics

Statistics is the 12th chapter in Class 9 Maths. Students are introduced to the concept of statistics and its significance and application in different fields. Concepts of data, data distribution, and representation, different types of graphs, etc., are also explained. Students will mainly learn to calculate mean, median, and mode in this chapter. NCERT Solution Class 9 Maths of Chapter 12 contains 4 exercises. The questions judge your comprehensive ability and analytical skills.

Exercise 12.1: This exercise involves interpreting data presented in a textual format (like percentages) and converting it into a suitable format for creating a bar graph.

Exercise 12.2: Here, you will be given a partially constructed bar graph with labels but missing bar heights. Based on the data provided, you'll likely practice calculating the heights of the bars and completing the graph.

Exercise 12.3: This exercise introduces you to interpreting information from a completed bar graph. You will be asked to answer questions like identifying the category with the highest/lowest value or comparing values between different categories.

Exercise 12.4: This exercise is a culmination of the previous ones. You might be presented with raw data or a partially completed graph, requiring you to use your understanding to create or interpret a complete bar graph and answer questions based on it.

In Class 9 Maths Chapter 12 on Surface Areas and Volumes, we cover the following:

Gathering data.

Presenting data in various formats such as tables, ungrouped and grouped data.

Creating bar graphs, histograms (with varying base lengths), and frequency polygons.

Analysing data qualitatively to determine the appropriate method of presentation.

Calculating mean, median, and mode for ungrouped data.

Statistics Important Questions

Chapter 12: Statistics Formulas

Chapter 12: Statistics Revision Notes

CBSE Class 9 Maths Chapter-Wise Marks Weightage 

Internal Assessment for CBSE Class 9 Maths

Benefits of Vedantu’S NCERT Solutions for Class 9 Maths

NCERT or National Council of Educational Research and Training was created to standardize India’s education system. The NCERT solutions can help you get an in-depth and detailed understanding of the concepts and questions from the NCERT textbooks. Here are some more benefits of Vedantu’s NCERT Solutions for Class 9 Maths:

1. All the Concepts are Explained in Detail

In these solutions, you will find that all the concepts have been explained in easy language and in detail. It will help you get a better understanding of the concepts and score well in your exams.

2. Accurate Solutions

The NCERT solutions for class 9 maths PDF by Vedantu have been created by experienced teachers. The solutions are well-reviewed so that students don’t get misguided by inaccurate study materials.

3. Learn Online and Offline

Vedantu’s NCERT Solutions for Class 9 Maths are available in PDF format online. You can download these PDFs and learn offline as well. This means you can study anytime and anywhere. It is also possible to share the links of the NCERT Maths class 9 solutions PDF download with your friends.

4. Get Your Doubts Cleared

If you are confused about any topic from your class 9 Maths syllabus, you can use these NCERT solutions for getting your doubts cleared. All the solutions are provided in an easy way so that you can have your concepts cleared.

5. Created by the Best Teachers

Vedantu’s NCERT Solutions for Class 9 Maths have been created by teachers who are subject matter experts. By studying through these high-quality study materials, you will be able to score more marks. The solutions have been designed after performing extensive research on the subject. Once you are done, you will be able to solve problems of varying difficulty levels.

6. Helps with Preparation For Exams

The NCERT Solutions contain a Chapter Wise List Of Class 9 Maths so that students can easily identify the important chapters that have significant weightage in the examinations. Thus, they can prepare for their exams well and score more marks by focusing on chapters that are crucial.

7. Makes Revision Easier

While revising the chapters, students don’t have to go through the entire book. The NCERT solutions have explained all the topics and concepts in a very easy manner. While solving the problems, students will learn about the theorems, formulas, and descriptions that are used. Thus, they will easily be able to complete the chapter without any interruptions.

Important Related Links for CBSE Class 9 Maths

Important Questions for CBSE Class 9 Math

RS Aggarwal Class 9 Solutions for Math book

NCERT Class 9 Math Formulas

NCERT Class 9 Maths Revision Notes

NCERT Class 9 Maths Exemplar Solutions

RD Sharma Solutions for NCERT Class 9

Vedantu's NCERT Solutions for Class 9 Maths provide comprehensive guidance and practice for each curriculum chapter. These solutions are essential for students aiming to understand concepts thoroughly and perform well in exams. Key areas to focus on include mastering formulas, practicing exercises, and understanding theorems and their applications. Additionally, topics such as Polynomials, Coordinate Geometry, Linear Equations, and Probability are crucial and often challenging, requiring extra attention and regular practice. Utilizing these solutions can significantly enhance a student's problem-solving skills and conceptual clarity.

FAQs on NCERT Solutions For class 9 Maths

1. How to study NCERT Solutions for Class 9 Maths in an easy way?

Vedantu offers a free PDF for NCERT Solutions for Maths Class 9. In addition to being totally free, the NCERT Maths class 9 solutions PDF download can be accessed anytime as per your convenience and from anywhere and what’s more important is that these are designed by experienced teachers and thus, are error-free and reliable.

2. How to download NCERT Solutions for Class 9 Maths PDFs?

The latest edition of  Class 9 NCERT Solutions for Maths are available at Vedantu from where they can be downloaded by clicking on the links provided. Based on the CBSE syllabus , these solutions will enhance your ability for exam preparation and the option for convenient download makes things more hassle-free. You can now prepare for Class 9 Maths as per the latest syllabus and get all the necessary study material at your fingertips.

3. Which are the important chapters in CBSE Class 9 Maths?

The Class 9 Maths important chapters include:

Polynomials

Surface Areas and Volume

Areas of Parallelograms and Triangles

Quadrilaterals

4. Which chapters and exercises are deleted from CBSE Class 9th Maths CBSE?

The chapters deleted from NCERT Class 9 CBSE Maths syllabus are Introduction to Euclid's Geometry and Areas of Parallelograms and Triangles. In addition to these, parts of various chapters are deleted as well.

5. Are these NCERT Solutions enough to score better in the Class 9 Maths Board Exam?

NCERT Solutions for Class 9 Maths help students to find answers to the textbook exercise problems and clear all their doubts regarding the questions given in the NCERT book. The solutions are provided by expert teachers who are well versed in the curriculum. By referring to these, students can learn how to write answers in the exam that would fetch more marks. Students should, however, first make a habit of understanding the chapters and then refer to the NCERT Solutions if they are having trouble in solving the questions given in the textbook. Students are also encouraged to practise questions from previous years and solve sample papers to improve their scores in the exam.

6. Why is it important to refer to NCERT Solutions for Class 9 Maths?

Studying from the NCERT Solutions for Class 9 Maths is very important as they are a reliable way for you to cross-check your answers. You can use these as a guide on how your answers should appear in an examination. It will help you ensure that you don’t miss any steps and score the best possible marks.

7. Should I make notes while going through the NCERT Solutions for Class 9 Maths?

When you are creating notes, you are creating a simple guide that will help you build a thorough understanding of the subject as well as when you want to revise it. It helps you retain and recall concepts when needed. So, if you want to expedite your learning process, you need to make notes as well.

8. What is the best way to learn the concepts that are covered in the NCERT Solutions for Class 9 Maths?

The best way for you to learn the concepts that are covered in the solutions is through regular practice. If you are facing some difficulty with a concept and are unable to proceed further, you need to clarify your doubts immediately. This will ensure that there are no gaps in your learning.

9. Can you use any other method for solving questions apart from the one provided in the NCERT Solutions for Class 9 Maths pdf?

Yes, you can use some other method for solving problems as long as it is universally recognized. You cannot use any tricks to solve exam problems. You have to use standardized techniques.

10. Why should I refer to Vedantu’s NCERT Solutions Class 9 Maths?

Vedantu’s NCERT Solutions Class 9 Maths contains answers to all the questions in the NCERT Class 9 Maths book. The solutions are present in a simple manner so that students can understand easily. These solutions are framed by subject-matter experts and the solutions are updated according to the latest curriculum of the CBSE. Hence, these are very reliable. It will help students to clear their doubts and strengthen their concepts.

11. Should I practice NCERT Solutions for Class 9 Maths regularly?

Yes, you should practice NCERT Solutions for Class 9 Maths regularly. Solving questions daily will improve your speed and accuracy. Your fundamental concepts will be cleared, and you will understand chapters of higher classes easily. If you practice daily, you will gain sufficient confidence to attempt new questions, and you can even play around with the concepts, which will enhance your analytical skills.

12. What is the best reference book for Class 9 Maths?

Vedantu’s NCERT Solutions for Class 9 Maths is the best reference book for Class 9 Maths. It has detailed and comprehensive solutions to all questions in your NCERT Maths book . All the topics are covered in this book, and it focuses on strengthening your concepts. This is prepared by top faculties and is in accordance with the latest CBSE curriculum , and is very reliable.

13. Which is the hardest chapter in Maths Class 9?

The hardest chapter in Class 9 Maths often varies for different students based on their individual strengths and weaknesses. However, many students find "Chapter 8: Quadrilaterals" and "Chapter 10: Circles" challenging due to the abstract concepts and theorems involved. Additionally, "Chapter 13: Surface Areas and Volumes" can also be tough due to the complex calculations and spatial visualization required.

14. Which chapter is most important in Class 9 Maths?

All chapters in Class 9 Maths are important as they lay the foundation for higher classes. However, some particularly crucial chapters include "Chapter 1: Number Systems," "Chapter 6: Lines and Angles," "Chapter 8: Quadrilaterals," and "Chapter 14: Statistics." These chapters introduce fundamental concepts that are extensively used in higher-level mathematics.

15. Is Class 9 Maths easy?

Class 9 Maths can be easy for some students and challenging for others. It largely depends on a student's grasp of the basics, their interest in the subject, and the amount of practice they put in. Consistent study, understanding the core concepts, and regular practice can make Class 9 Maths manageable and even enjoyable.

16. Is Class 9 Maths important?

Yes, Class 9 Maths is very important. It builds the foundation for Class 10 and higher secondary level mathematics. The concepts learned in Class 9 are crucial for understanding more advanced topics in future classes. A strong understanding of Class 9 Maths also aids in various competitive exams and entrance tests later on.

By focusing on understanding the concepts thoroughly and practising regularly, students can excel in Class 9 Maths and find it to be a rewarding subject.

NCERT SOLUTIONS FOR CLASS 9

Cbse class 9 study materials.

• NCERT Solutions
• NCERT Class 9
• NCERT 9 Science

NCERT Solutions for Class 9 Science

Ncert solutions for class 9 science updated for 2023-24 free chapterwise pdf download.

NCERT Solutions for Class 9 Science help students to clear any doubts instantly and efficiently. These NCERT Solutions guide students to learn the important concepts which are included in the CBSE Class 9 Science syllabus. Students are required to solve the exercise questions included in the textbook to create a proper understanding of the topics.

While solving the textbook questions, doubts arise among students. The NCERT Solutions for Class 9 come in handy at such times, as they include precise explanations and detailed answers to those questions. These CBSE Science NCERT Solutions for Class 9 cover solutions to all the important chapters included in the textbook, like Matter, Atoms, Tissues, Living Organisms, Motion, Force, Laws of Motion, Gravitation, Energy and Work, Sound, Natural Resources, etc.

Along with answers to the textbook questions, these solutions provide you with extra questions, exemplar problems, the important questions from previous year question papers, sample papers , worksheets, MCQs, short answering questions, descriptive type questions, their solutions, as well as tips and tricks.

NCERT Solutions for Class 9 Science Chapter-Wise PDFs

NCERT Solutions for Class 9 Science are provided in a format for better accessibility to the students. These solutions serve as an important studying tool for students who are preparing for their board examinations and assignments.

NCERT Solutions of Class 9 Science Book Chapter Brief

Chapter 1: matter in our surrounding.

The Class 9 science textbook starts with the chapter “Matter in Our Surroundings”. Everything that we see around us is made up of material which is called matter. These things occupy space and have mass. Earlier, Indian philosophers had classified matter into 5 basic elements called Panch Tatva – air, water, earth, sky and fire. Now, modern scientists have come up with 2 types of classification, i.e., based on physical property and chemical nature. In this chapter, students will learn about the physical properties of matter .

The matter is made up of particles and these particulars are very small. The particles of matter have space between them, they are continuously moving and attract each other. The matter around us exists in 3 different states – solids, liquids and gases. These states of matter arise due to variation in the characteristic of the particles of matter. All the 3 states of matters have been explained in-depth with the help of activities. Further, the textbook explains that the state of matter is inter-convertible. The state of matter can be changed by changing temperature or pressure. The phenomenon of change of a liquid into vapour at any temperature below its boiling point is called evaporation. The rate of evaporation depends upon the surface area exposed to the atmosphere, the temperature, the humidity and the wind speed. Evaporation also causes cooling.

Topics Covered in Class 9 Science Chapter 1 Matter in Our Surrounding :

Definition of matter; solid, liquid and gas; characteristics – shape, volume, density; change of state –  melting (absorption of heat), freezing, evaporation (cooling by evaporation), condensation, sublimation.

Also access the following resources for Class 9 Chapter 1 Matter in Our Surrounding at BYJU’S:

• Matter in Our Surroundings Class 9 Notes – Chapter 1
• CBSE Class 9 Science Chapter 1 Matter in Our Surroundings Important Questions
• NCERT Exemplar Class 9 Science Solutions for Chapter 1 – Matter in Our Surroundings

Chapter 2: Is Matter Around Us Pure?

This chapter of NCERT Class 9 Science students will teach about mixtures, solutions, properties of solutions, separation of mixtures, and physical and chemical changes. Along with this, they will also learn about compounds and their properties, the difference between mixtures and compounds, the classification of matter, etc.

Topics Covered in Class 9 Science Chapter 2 Is Matter Around Us Pure?  :

Nature of matter: Elements, compounds and mixtures. Heterogeneous and homogenous mixtures, colloids and suspensions. Physical and chemical changes (excluding separating the components of a mixture).

Also, access the following resources for Class 9 Chapter 2 Is Matter Around Us Pure? at BYJU’S:

• CBSE Class 9 Science Chapter 2 Is Matter Around Us Pure? Notes
• Important Questions for CBSE Class 9 Science Chapter 2 – Is Matter Around Us Pure?
• NCERT Exemplar Class 9 Science Solutions for Chapter 2 – Is Matter Around Us Pure?

Chapter 3: Atoms and Molecules

In NCERT Class 9 Science Chapter 3, students will learn the laws of chemical combination , atoms and molecules. They will get to know how to write a chemical formula, molecular mass and mole concepts and some numerical problems related to these concepts.

Topics Covered in Class 9 Science Chapter 3 Atoms and Molecules  :

Particle nature and their basic units: Atoms and molecules, Law of Chemical Combination, Chemical formula of common compounds, Atomic and molecular masses.

Also, access the following resources for Class 9 Chapter 3 Atoms and Molecules, at BYJU’S:

• Atoms And Molecules Class 9 Notes – Chapter 3
• Important Questions for Class 9 Science Chapter 3 – Atoms and Molecules
• NCERT Exemplar Class 9 Science Solutions for Chapter 3 – Atoms And Molecules

Chapter 4: Structure of the Atom

This chapter of NCERT Class 9 Science deals with the various atomic models of atoms that were proposed by different scientists. In addition to it, this chapter also covers electrons’ distribution in different orbits, calculation of valency , atomic number and mass number.

Topics Covered in Class 9 Science Chapter 4 Structure of the Atom  :

Structure of atoms: Electrons, protons and neutrons, Valency, Atomic Number and Mass Number, Isotopes and Isobars.

Also, access the following resources for Class 9 Chapter 4 Structure of the Atom at BYJU’S:

• Structure of the Atom Class 9 CBSE Notes – Chapter 4
• Important Questions of CBSE Class 9 Science Chapter 4 – Structure of the Atom
• NCERT Exemplar Class 9 Science Solutions for Chapter 4 – Structure of the Atom

Chapter 5: The Fundamental Unit of Life

This chapter is related to Biology. In this chapter, students will get to know that the cell is the fundamental unit of life. The whole chapter revolves around the cell and its structural organisation, in which students will learn about the plasma membrane , cell wall, nucleus, cytoplasm and structure of an animal cell.

Topics Covered in Class 9 Science Chapter 5 The Fundamental Unit of Life  :

Cell – Basic Unit of life: Cell as a basic unit of life; prokaryotic and eukaryotic cells, multicellular organisms; cell membrane and cell wall, cell organelles and cell inclusions; chloroplast, mitochondria, vacuoles, endoplasmic reticulum, Golgi apparatus; nucleus, chromosomes – basic structure, number.

Also, access the following resources for Class 9 Chapter 5 The Fundamental Unit of Life at BYJU’S:

• The Fundamental Unit of Life Class 9 CBSE Notes – Chapter 5
• Revision Notes For Class 9 Science Chapter 5 The Fundamental Unit of Life
• NCERT Exemplar Class 9 Science Solutions for Chapter 5 – The Fundamental Unit of Life

Chapter 6: Tissues

This chapter pertains to the basic definition of tissue and then elaborates on Plant and Animal tissue with proper diagrams. Students will get to know the different types of plant and animal tissues with a detailed explanation of each.

Topics Covered in Class 9 Science Chapter 6 Tissues  :

Tissues, Organs, Organ System, Organism: Structure and functions of animal and plant tissues (only four types of tissues in animals; Meristematic and Permanent tissues in plants).

Also, access the following resources for Class 9 Chapter 6 Tissues at BYJU’S:

• Tissues Class 9 CBSE Notes – Chapter 6
• Revision Notes For Class 9 Science Chapter 6 Tissues
• NCERT Exemplar Class 9 Science Solutions for Chapter 6 – Tissues

Chapter 7: Diversity in Living Organism

This chapter deals with the classification of plants and animals. Students get to know that all living organisms are divided into 5 kingdoms namely Monera, Protista, Fungi, Plantae and Animalia. It also describes the classification and evolution, the hierarchy of classification.

Also access the following resources for Class 9 Chapter 7 Diversity in Living Organism at BYJU’S:

• Diversity in Living Organisms Class 9 CBSE Notes – Chapter 7
• Important Questions for CBSE Class 9 Science Chapter 7 – Diversity in Living Organisms
• NCERT Exemplar Class 9 Science Solutions for Chapter 7 – Diversity In Living Organisms

Chapter 8: Motion

NCERT Class 9 Science Chapter 8 describes motion, the speed with direction, rate of change of velocity , and graphical representation of motion. Also, students will find the 3 equations of motion and numerical problems related to them. Overall, this chapter will be a mix of theory as well as the numerical part.

Topics Covered in Class 9 Science Chapter 8 Motion :

Motion: Distance and displacement, velocity; uniform and non-uniform motion along a straight line; acceleration, distance-time and velocity-time graphs for uniform motion and uniformly accelerated motion, elementary idea of uniform circular motion.

Also, access the following resources for Class 9 Chapter 8 Motion at BYJU’S:

• CBSE Class 9 Physics Motion Notes
• NCERT Exemplar Class 9 Science Solutions for Chapter 8 – Motion

Chapter 9: Force and Law of Motion

This chapter explains the 3 laws of motion with the help of diagrams and examples. Below are the 3 laws of motion:

• First law of motion: An object continues to be in a state of rest or of uniform motion along a straight line unless acted upon by an unbalanced force.
• Second law of motion: The rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of the force .
• Third law of motion: To every action, there is an equal and opposite reaction, and they act on two different bodies.

Topics Covered in Class 9 Science Chapter 9 Force and Law of Motion  :

Force and Newton’s laws: Force and Motion, Newton’s Laws of Motion, Action and Reaction forces, Inertia of a body, Inertia and mass, Momentum, Force and Acceleration.

Also, access the following resources for Class 9 Chapter 9 Force and Law of Motion at BYJU’S:

• Force and Laws Of Motion Class 9 CBSE Notes – Chapter 9
• Revision Notes For Class 9 Science Chapter 9 Force and Laws of Motion
• NCERT Exemplar Class 9 Science Solutions for Chapter 9 – Force and Laws Of Motion

Chapter 10: Gravitation

In chapter 10 of NCERT Class 9 Science, students will learn the universal law of gravitation and its importance, free fall, mass, weight, thrust and pressure, Archimedes’ principle and relative density. Students will also find numerical problems related to these topics.

Topics Covered in Class 9 Science Chapter 10 Gravitation :

Gravitation: Gravitation; Universal Law of Gravitation, Force of Gravitation of the earth (gravity), Acceleration due to Gravity; Mass and Weight; Free fall.

Floatation: Thrust and Pressure. Archimedes’ Principle; Buoyancy.

Also, access the following resources for Class 9 Chapter 10 Gravitation at BYJU’S:

• Gravitation Class 9 CBSE Notes – Chapter 10
• Revision Notes For Class 9 Science Chapter 10 Gravitation
• NCERT Exemplar Class 9 Science Solutions for Chapter 10 – Gravitation

Chapter 11: Work and Energy

In this chapter, the concept of work is defined with different activities, numerical and examples. The chapter also deals with energy and its different forms. Examples are given to explain all types of energy. The chapter ends with the topic “rate of doing work”.

Topics Covered in Class 9 Science Chapter 11 Work and Energy  :

Work, Energy and Power: Work done by a Force, Energy, power; Kinetic and Potential energy; Law of conservation of energy (excluding commercial unit of Energy).

Also, access the following resources for Class 9 Chapter 11 Work and Energy at BYJU’S:

• Work And Energy Class 9 CBSE Notes – Chapter 11
• Revision Notes For Class 9 Science Chapter 11 Work and Energy
• NCERT Exemplar Class 9 Science Solutions for Chapter 11 – Work And Energy

Chapter 12: Sound

Chapter 12 of CBSE Class 9 Science, deals with concepts such as the production of sound, propagation of sound, the reflection of sound, range of hearing, applications of ultrasound, and the structure of the human ear . A few numericals are also there in the chapter which can only be solved after understanding the concepts. So, students must grasp and study the chapter carefully.

Topics Covered in Class 9 Science Chapter 12 Sound :

Sound: Nature of sound and its propagation in various media, speed of sound, range of hearing in humans; ultrasound; reflection of sound; echo.

Also access the following resources for Class 9 Chapter 12 Sound at BYJU’S:

• CBSE Class 9 Science Chapter 12 Sound Notes
• Important Questions for CBSE Class 9 Science Chapter 12 – Sound
• NCERT Exemplar Class 9 Science Solutions for Chapter 12 – Sound

Chapter 13: Why Do We Fall Ill?

NCERT Class 9 Science chapter 13 deals with health issues and different types of diseases. It covers topics like; Health and its failure , disease and its cause, infectious diseases. This chapter is added to make students aware of different types of diseases so that they take care of their health and be fit and healthy.

Also access the following resources for Class 9 Chapter 13 Why Do We Fall Ill? at BYJU’S:

• Why Do We Fall Ill? Class 9 CBSE Notes – Chapter 13
• Important Questions for CBSE Class 9 Science Chapter 13 – Why Do We Fall Ill?
• NCERT Exemplar Class 9 Science Solutions for Chapter 13 – Why Do We Fall Ill?

Chapter 14: Natural Resources

We are blessed with natural resources. These are essential to meet the basic requirements of all forms of life on Earth. So, this chapter has been included by NCERT to provide knowledge on the types of resources available on the Earth. This chapter deals with the topics like air, water, soil, the biogeochemical cycle and the ozone layer, its importance and how humans are polluting them.

Also access the following resources for Class 9 Chapter 14 Natural Resources at BYJU’S:

• Natural Resources Class 9 CBSE Notes – Chapter 14
• Revision Notes For Class 9 Science Chapter 14 Natural Resources
• NCERT Exemplar Class 9 Science Solutions for Chapter 14 – Natural Resources

Chapter 15: Improvement in Food Resources

The last chapter of NCERT Class 9 Science covers topics like Improvement in crop yields, manure, fertilizer, storage of grains, and animal husbandry . This chapter provides knowledge regarding agriculture, farming and dairy.

Also access the following resources for Class 9 Chapter 15 Improvement in Food Resources at BYJU’S:

• Improvement in Food Resources Class 9 CBSE Notes – Chapter 15
• Important Questions for CBSE Class 9 Science Chapter 15 – Improvement in Food Resources
• Revision Notes For Class 9 Science Chapter 15 Improvement in Food Resources
• NCERT Exemplar Class 9 Science Solutions for Chapter 15 – Improvement In Food Resources

To download the complete book in PDF format, visit NCERT Science Book Class 9 . For more practice tests and mock tests, sign up on BYJU’S the learning app. Apart from Science, get NCERT Solutions for all the subjects. Students can download worksheets, assignments, NCERT Books , notes and study materials for exam preparation and for a better understanding of the topics.

CBSE Class 9 Science Evaluation Scheme (Theory) –

Features of NCERT 9 th Class Science Book Solutions

The book has a wide variety of features which are listed below:

• CBSE Class 9 Science NCERT Solutions are available to everyone for free.
• Covers all the exercise problems from the Class 9 textbook.
• Consists of extra questions, exemplar problems, the important questions from previous year question papers and sample papers, worksheets, MCQs, short answering questions, descriptive type questions, their solutions and tips and tricks.
• CBSE Class 9 Science Solutions files are available for download in PDF format for easy access.
• Diagrams are included to help students visualize the topics.
• Most effective solutions are given which can help to score well in the exams.

Frequently Asked Questions on NCERT Solutions for Class 9 Science

How many chapters are there in the ncert solutions for class 9 science , can i expect the questions from ncert solutions for class 9 science to be asked in the annual exam, is the ncert solutions for class 9 science sufficient for the exam preparation, why should students refer to the ncert solutions for class 9 science .

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Class 9 Physics Assignment Answer 2021 with PDF (9th Week)

DSHE 9th week class nine Physics assignment solution 2021. Class 9 Physics assignment answer 2021 PDF is available on our website. Science group physics assignment has been published on the official website of the Directorate of Secondary and Higher Education. To get class 9 assignment answer follow this post.

However, the assignment solution will be published on our website. So let’s download the assignment solution.

Class 9 Physics Assignment Answer 2021

In the sixth week, Physics assignments will be given to the students of class 9. Physics is a group-based subject. This subject is compulsory for students of science group.

This subject is a little difficult among the other subjects of the science group. But if you understand, everything is easy. However, the answer to the assignment of this subject will be published in this post.

Every week, assignment answers of all the subjects of class nine are published on our website. Similarly, this week’s Physics assignment answer will also be published. So let’s look at the physics assignment and the assignment answer.

Check Also: Download Class 9-10 Physics Book PDF

Class Nine Physics Assignment Answer 2021

Here you will find 6th & 9th week class nine Physics assignment answer 2021. Our experienced person will solve the assignment.

9th Week Physics Assignment Question & Answer

• Assignment Answer

আধুনিক সভ্যতা হচ্ছে বিজ্ঞানের অবদান। বিজ্ঞানের এই অগ্রগতি এক দিনে হয়নি, শত শত বছর থেকে অসংখ্য বিজ্ঞানী এবং গবেষকের অক্লান্ত পরিশ্রমে একটু একটু করে আধুনিক বিজ্ঞান বর্তমান অবস্থায় পৌঁছেছে। বিজ্ঞানের যে শাখায় পদার্থ ও শক্তি নিয়ে আলােচনা করা হয় সেই শাখাকে পদার্থবিজ্ঞান বলা হয়। পর্যবেক্ষণ, পরীক্ষণ ও বিশ্লেষণের আলােকে বস্তু ও শুক্তির রূপান্তর ও সম্পর্ক উদঘাটন এবং পরিমাণগতভাবে তা প্রকাশ করাই হচ্ছে পদার্থবিজ্ঞানের মূল লক্ষ্য ও উদ্দেশ্য।

পদার্থবিজ্ঞানের পরিসর

পদার্থবিজ্ঞান যেহেতু বিজ্ঞানের প্রাচীনতম শাখা এবং সবচেয়ে মৌলিক শাখা,শুধু তাই নয় বিজ্ঞানের অন্যান্য শাখা কোনাে না কোনােভাবে এই শাখাকে ভিত্তি করে গড়ে উঠেছে তাই খুব স্বাভাবিকভাবেই পদার্থবিজ্ঞানের পরিসর অনেক বড়। পদার্থবিজ্ঞান হচ্ছে বিজ্ঞানের একটি মৌলিক শাখা কেননা এর নীতিগুলােই বিজ্ঞানের অন্যান্য শাখাসমূহের ভিত্তি তৈরি করেছে।

উদাহরণ স্বরূপ, শক্তির সংরক্ষণশীলতা নীতি হচ্ছে পদার্থবিজ্ঞানের একটি মূল নীতি যা হচ্ছে পরমাণুর গঠন থেকে শুরু করে আবহাওয়ার পূর্বাভাস দান পর্যন্ত বিজ্ঞানের বিস্তৃত এলাকার মূল ভিত্তি। প্রকৌশলশাস্ত্র থেকে শুরু করে চিকিৎসা বিজ্ঞান, জ্যোতির্বিজ্ঞান থেকে শুরু করে সমুদ্রবিজ্ঞান, জীববিজ্ঞান থেকে শুরু করে মনােবিজ্ঞান সর্বত্র পদার্থবিজ্ঞানের পদ্ধতি ও যন্ত্রপাতির প্রভূত ব্যবহার রয়েছে।

পদার্থবিজ্ঞানকে নিম্নোক্ত শাখাগুলােতে ভাগ করতে পারিঃ

বলবিজ্ঞান, তাপ ও তাপগতিবিজ্ঞান, শব্দবিজ্ঞান, আলােকবিজ্ঞান,তাড়িত চৌম্বকবিজ্ঞান, কঠিন অবস্থার পদার্থবিজ্ঞান, পারমাণবিক পদার্থবিজ্ঞান। নিউক্লীয় পদার্থবিজ্ঞান, কোয়ান্টাম পদার্থবিজ্ঞান, ইলেকট্রনিক্স ইত্যাদি।

পদার্থবিজ্ঞানের ক্রমবিকাশ যেভাবে ঘটেছে:

আধুনিক সভ্যতা বিজ্ঞানের ফসল। বিজ্ঞানের এই অগ্রগতির পেছনে রয়েছে বিজ্ঞানীদের অক্লান্ত পরিশ্রম, নানা আবিষ্কার ও উদ্ভাবন। বিজ্ঞানের কোনাে জাতীয় বা রাজনৈতিক সীমা নেই। বিজ্ঞানের উন্নতি, সমৃদ্ধি ও কল্যাণ সকল জাতির সকল মানুষের জন্য। প্রাচীনকাল থেকেই বিজ্ঞানীরা বিজ্ঞানের উন্নয়নে অবদান রেখে আসছেন। থেলিস সূর্যগ্রহণ সম্পর্কিত ভবিষ্যদ্বাণীর জন্য বিখ্যাত। তিনি লােডস্টোনের চৌম্বক ধর্ম সম্পর্কেও জানতেন। বিজ্ঞানের ইতিহাসে পিথাগােরাস একটি স্মরণীয় নাম। বিভিন্ন জ্যামিতিক উপপাদ্য ছাড়াও কম্পমান তারের উপর তাঁর কাজ অধিক স্থায়ী অবদান রাখতে সক্ষম হয়েছিল।

বর্তমানে বাদ্যযন্ত্র ও সংগীত বিষয়ক যে স্কেল রয়েছে তা তারের কম্পন বিষয়ক তাঁর অনুসন্ধানের আংশিক অবদান। গ্রিক দার্শনিক ডেমােক্রিটাস ধারণা দেন যে পদার্থের অবিভাজ্য একক রয়েছে। তিনি একে নাম দেন এটম বা পরমাণু। পারমাণু সম্পর্কে তাঁর এই ধারণা বর্তমান ধারণার চেয়ে সম্পূর্ণ আলাদা হলেও বেশ তাৎপর্যপূর্ণ। গ্রিক বিজ্ঞানী আর্কিমিডিস লিভারের নীতি ও তরলে নিমজ্জিত বস্তুর উপর ক্রিয়াশীল উর্ধ্বমুখী বলের সূত্র আবিষ্কার করে ধাতুর ভেজাল নির্ণয়ে সক্ষম হন। তিনি গােলীয়। দর্পণের সাহায্যে সূর্যের রশ্মি কেন্দ্রীভূত করে আগুন ধরানাের কৌশলও জানতেন।

আর্কিমিডিসের পর কয়েক শতাব্দীকাল বৈজ্ঞানিক আবিষ্কার মন্থর গতিতে চলে। প্রকৃতপক্ষে ত্রয়ােদশ শতাব্দীর পূর্বে ইউরােপে বৈজ্ঞানিক অনুসন্ধিৎসার পুনর্জীবন ঘটেনি। এই সময় পশ্চিম ইউরােপীয় সভ্যতা বিশেষভাবে গ্রহণ করেছিল বাইজানটাইন ও মুসলিম সভ্যতার জ্ঞানের ধারা। আরবরা বিজ্ঞান, গণিত, জ্যোতির্বিদ্যা, রসায়ন ও চিকিৎসা। বিজ্ঞানেও বিশেষ পারদর্শী ছিলেন। এই সময় পদার্থবিজ্ঞানের একটি শাখা আলােক তত্ত্বের ক্ষেত্রে ইবনে আল হাইথাম এবং আল হাজেন এর অবদান বিশেষ উল্লেখযােগ্য। টলেমি ও অন্যান্য প্রাচীন বিজ্ঞানীরা বিশ্বাস করতেন। যে কোনাে বস্তু দেখার জন্য চোখ নিজে আলােক রশ্মি পাঠায়। আল হাজেন এই মতের বিরােধিতা করেন এবং বলেন যে বস্তু থেকে আমাদের চোখে আলাে আসে বলেই আমরা বস্তুকে দেখতে পাই। আতশি কাচ নিয়ে পরীক্ষা তাঁকে উত্তল লেন্সের আধুনিকতত্ত্বের কাছাকাছি নিয়ে আসে।।

আল-মাসুদী প্রকৃতির ইতিহাস সম্পর্কে একটি এনসাইক্লোপিডিয়া লেখেন। এই বইয়ে বায়ুকলের উল্লেখ পাওয়া যায়। বর্তমানে পৃথিবীর অনেক দেশে এই বায়ুকলের সাহায্যে তড়িৎশক্তি উৎপাদন করা হচ্ছে। রজার বেকন ছিলেন পরীক্ষামূলক বৈজ্ঞানিক পদ্ধতির প্রবক্তা। তাঁর মতে পর্যবেক্ষণ ও পরীক্ষার মাধ্যমেই বিজ্ঞানের সব সত্য যাচাই করা উচিত। বর্তমানে । বাদ্যযন্ত্র ও সংগীত বিষয়ক যে স্কেল রয়েছে তা তারের কম্পন বিষয়ক তাঁর অনুসন্ধানের আংশিক অবদান।

গ্রিক দার্শনিক ডেমােক্রিটাস ধারণা দেন যে পদার্থের অবিভাজ্য একক রয়েছে। তিনি একে নাম দেন এটম বা পরমাণু । পারমাণু সম্পর্কে তাঁর এই ধারণা বর্তমান ধারণার চেয়ে সম্পূর্ণ আলাদা হলেও বেশ তাৎপর্যপূর্ণ। গ্রিক বিজ্ঞানী আর্কিমিডিস লিভারের নীতি ও তরলে নিমজ্জিত বস্তুর উপর ক্রিয়াশীল ঊর্ধ্বমুখী বলের সূত্র আবিষ্কার করে ধাতুর ভেজাল নির্ণয়ে সক্ষম হন। তিনি গােলীয় দর্পণের সাহায্যে সূর্যের রশ্মি কেন্দ্রীভূত করে আগুন ধরানাের কৌশলও জানতেন।

আর্কিমিডিসের পর কয়েক শতাব্দীকাল বৈজ্ঞানিক আবিষ্কার মন্থর গতিতে চলে। প্রকৃতপক্ষে ত্রয়ােদশ শতাব্দীর পূর্বে ইউরােপে বৈজ্ঞানিক অনুসন্ধিৎসার পুনর্জীবন ঘটেনি। এই সময় পশ্চিম ইউরােপীয় সভ্যতা বিশেষভাবে গ্রহণ করেছিল বাইজানটাইন ও মুসলিম সভ্যতার জ্ঞানের ধারা। আরবরা ব্রিজ্ঞান, গণিত, জ্যোতির্বিদ্যা, রসায়ন ও চিকিৎসা | বিজ্ঞানেও বিশেষ পারদর্শী ছিলেন। এই সময় পদার্থবিজ্ঞানের একটি শাখা আলােক তত্ত্বের ক্ষেত্রে ইবনে আল হাইথাম এবং আল হাজেন এর অবদান বিশেষ উল্লেখযােগ্য।

নিউটন তাঁর বিস্ময়কর প্রতিভার দ্বারা আবিষ্কার করেন বলবিদ্যা ও বলবিদ্যার বিখ্যাত তিনটি সূত্র এবং বিশ্বজনীন মহাকর্ষ সূত্র। আলােক, তাপ ও শব্দবিজ্ঞানেও তার অবদান আছে। গণিতের নতুন শাখা ক্যালকুলাসও তাঁর আবিষ্কার। অষ্টাদশ ও ঊনবিংশ শতাব্দীর আবিষ্কার ও উদ্ভাবন ইউরােপকে শিল্প বিপ্লবের দিকে নিয়ে যায়। জেমস ওয়াটের আবিষ্কৃত বাষ্পীয় ইঞ্জিন শিল্প বিপ্লবের ক্ষেত্রে গুরুত্বপূর্ণ ভূমিকা পালন করে। হ্যান্স ক্রিফিয়ান ওয়েরস্টেড দেখান যে, তড়িৎ প্রবাহের চৌম্বক ক্রিয়া আছে। এই আবিষ্কার মাইকেল ফ্যারাডে, হেনরী ও লেঞ্জ কে পরিচালিত করে চৌম্বক ক্রিয়া তড়িৎ প্রবাহ উৎপাদন করে এই ঘটনা আবিষ্কারের দিকে। আসলে এটি হলাে যান্ত্রিক শক্তিকে তড়িৎ শক্তিতে রূপান্তরের প্রক্রিয়া আবিষ্কার।

১৮৬৪ সালে জেমস ক্লার্ক ম্যাক্সওয়েল দেখান যে আলাে এক প্রকার তাড়িত চৌম্বক তরঙ্গ। তিনি তড়িৎ ক্ষেত্র ও চৌম্বক ক্ষেত্রকে একীভূত করে তাড়িত চৌম্বক তত্ত্বের বিকাশ ঘটান। ১৮৮৮ সালে হেনরিখ হার্জও একই রকম বিকিরণ উৎপাদন ও উদঘাটন করেন। ১৮৯৬ সালে মার্কনী এ রকম তরঙ্গ ব্যবহার করে অধিক দূরত্বে মাের্সকোডে সংকেত পাঠানাের ব্যবস্থা করেন। তারও আগে বাঙালি বিজ্ঞানী জগদীশ চন্দ্র বসু তাড়িত চৌম্বক তরঙ্গের মাধ্যমে এক স্থান থেকে অন্য স্থানে শক্তি প্রেরণে সক্ষম হন। এভাবে বেতার যােগাযােগ জন্মলাভ করে।

এই ঊনবিংশ শতাব্দীর শেষের দিকে রনজেন এক্স-রে এবং বেকেরেল ইউরেনিয়ামের তেজক্রিয়তা আবিষ্কার করেন। বিংশ শতাব্দীতে । পদার্থবিজ্ঞানের বিস্ময়কর অগ্রগতি ঘটে। ম্যাক্স প্ল্যাঙ্ক আবিষ্কার করেন বিকিরণ সংক্রান্ত কোয়ান্টাম তত্ত্ব। আলবার্ট আইনস্টাইন প্রদান করেন আপেক্ষিক তত্ত্ব। এই দুই তত্ত্ব আগেকার পরীক্ষালব্ধ ফলাফলকেই শুধু ব্যাখ্যা করেনি, এমন ভবিষ্যদ্বাণীও প্রদান করেছে যা পরে আরাে পরীক্ষানিরীক্ষা দ্বারা প্রমাণিত হয়েছে। আর্নেস্ট রাদারফোর্ডের পরমাণু বিষয়ক নিউক্লীয় তত্ত্ব ও নীলস বােরের হাইড্রোজেন পরমাণুর ইলেকট্রন স্তরের ধারণা পারমাণবিক পদার্থবিজ্ঞানের অত্যন্ত গুরুত্বপূর্ণ ধাপ ছিল।

পরবর্তী গুরুত্বপূর্ণ আবিষ্কার ঘটে ১৯৩৮ সালে। এই সময় ওটো হান ও স্ট্রেসম্যান বের করেন যে নিউক্লীয়াস ফিশনযােগ্য। ফিশনের ফলে একটি বড় ভর সংখ্যা বিশিষ্ট নিউক্লীয়াস প্রায় সমান ভর সংখ্যা বিশিষ্ট দুটি নিউক্লীয়াসে রূপান্তরিত হয় এবং নিউক্লীয়াসের ভরের একটি অংশ শক্তিতে রূপান্তরিত হয়- জন্ম নেয় নিউক্লীয় বােমা ও নিউক্লীয় চুল্লির।

বর্তমানে আমরা নিউক্লীয়াস থেকে যে শক্তি পাচ্ছি তা অতীতের সকল উৎস থেকে প্রাপ্ত শক্তির তুলনায় বিপুল। দিন দিন নিউক্লীয় শক্তি শক্তির একটি প্রধান উৎস হিসেবে পরিগণিত হচ্ছে। এই শতাব্দীতেই তাত্ত্বিক । পদার্থবিজ্ঞানে বিকাশ লাভ করেছে কোয়ান্টাম তত্ত্ব, আপেক্ষিক তত্ত্ব প্রভৃতি।

তিনজন নােবেল পুরস্কার বিজয়ী পদার্থবিজ্ঞানী পাকিস্তানের প্রফেসর আবদুস সালাম, মার্কিন যুক্তরাষ্ট্রের শেলডন গ্লাশাে এবং স্টিভেন ওয়াইনবার্গ একীভূত ক্ষেত্ৰতত্ত্বের বেলায় মৌলিক বলগুলােকে। একত্রীকরণের ক্ষেত্রে তাড়িত দুর্বল বল আবিষ্কার করে অসামান্য অবদান রাখেন।

বিংশ শতাব্দীতে চিকিৎসা বিজ্ঞানের অগ্রগতিতে পদার্থবিজ্ঞান রাখছে গুরুত্বপূর্ণ অবদান। চিকিৎসাবিজ্ঞানের বিভিন্ন যন্ত্রপাতি আবিষ্কারের পাশাপাশি তেজক্রিয় আইসােটপ বিভিন্ন চিকিৎসায় ব্যবহৃত হয়ে রােগ নিরাময়ের ক্ষেত্রেও অসামান্য অবদান রাখছে।

বিংশ শতাব্দীতে পদার্থবিজ্ঞানের আরেকটি গুরত্বপূর্ণ অগ্রগতি মহাশূন্য অভিযান। চাঁদে মানুষের পদাপর্ণ থেকে শুরু করে মঙ্গল গ্রহে অভিযানসহ মহাশূন্য স্টেশনে মাসের পর মাস মানুষের বসবাস জ্ঞানের ক্ষেত্রে অসামান্য অগ্রগতি। কৃত্রিম উপগ্রহ আবহাওয়ার পূর্বাভাস দানে কিংবা যােগাযােগকে সহজ করতে চমৎকার অবদান রাখছে। আর ইলেকট্রনিক্স তাে আমাদের দৈনন্দিন জীবনে নিয়ে এসেছে বিপ্লব, পাল্টে দিচ্ছে জীবন যাপন প্রণালি। রেডিও, টেলিভিশন, ডিজিটাল ক্যামেরা, মােবাইল ফোন, আই প্যাড আর কম্পিউটারের কথা এখন ঘরে ঘরে। বিভিন্ন ইলেকট্রনিক সরঞ্জাম ও কম্পিউটার মানুষের ক্ষমতাকে অনেকখানি বাড়িয়ে দিয়েছে।

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Here are some tips to help you get better at physics-

• Physics is the sum of some formulas and these formulas are the basis of physics. If you memorize these formulas well, you will easily understand other parts of physics as well. But try to understand rather than memorize the formulas.
• There are many equations in physics that you will find many times while reading physics. Some of these equations are very easy and some are very complex. But the interesting thing is that all of the complex equations come from simple equations. So first of all master the general equations of physics.
• The results of using the wrong unit for mathematical problems may not be acceptable. Also, if you remember the formulas as well as the units, you can solve any kind of problem very quickly. So remember the most used units and learn to find the unit based on the data mentioned in the question.

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