# Ncert Physics Book

Only available on StudyMode
• Published : October 22, 2012

Text Preview
Presents NCERT Text Books

NCERT Text Books: 11th Class Physics

About Us: Prep4Civils, website is a part of Sukratu Innovations, a start up by IITians. The main theme of the company is to develop new web services which will help people. P rep4Civils is an online social networking platform intended for the welfare of people who are preparing for Civil services examinations. The whole website was built on open-source platform Wordpress.

Contact Details:
Website: http://www.prep4civils.com/

CONTENTS
FOREWORD
PREFACE
A NOTE FOR THE TEACHER
CHAPTER

iii
v
x

1

PHYSICAL WORLD
1.1
1.2
1.3
1.4
1.5

What is physics ?
Scope and excitement of physics
Physics, technology and society
Fundamental forces in nature
Nature of physical laws

CHAPTER

1
2
5
6
10

2

UNITS AND MEASUREMENTS
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10

Introduction
The international system of units
Measurement of length
Measurement of mass
Measurement of time
Accuracy, precision of instruments and errors in measurement Significant figures
Dimensions of physical quantities
Dimensional formulae and dimensional equations
Dimensional analysis and its applications

CHAPTER

16
16
18
21
22
22
27
31
31
32

3

MOTION IN A STRAIGHT LINE
3.1
3.2
3.3
3.4
3.5
3.6
3.7

Introduction
Position, path length and displacement
Average velocity and average speed
Instantaneous velocity and speed
Acceleration
Kinematic equations for uniformly accelerated motion
Relative velocity

CHAPTER

39
39
42
43
45
47
51

4

MOTION IN A PLANE
4.1
4.2
4.3
4.4
4.5

Introduction
Scalars and vectors
Multiplication of vectors by real numbers
Addition and subtraction of vectors – graphical method
Resolution of vectors

65
65
67
67
69

CK

xii
4.6
4.7
4.8
4.9
4.10
4.11

Motion in a plane
Motion in a plane with constant acceleration
Relative velocity in two dimensions
Projectile motion
Uniform circular motion

CHAPTER

71
72
75
76
77
79

5

LAWS OF MOTION
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
5.11

Introduction
Aristotle’s fallacy
The law of inertia
Newton’s first law of motion
Newton’s second law of motion
Newton’s third law of motion
Conservation of momentum
Equilibrium of a particle
Common forces in mechanics
Circular motion
Solving problems in mechanics

CHAPTER

89
90
90
91
93
96
98
99
100
104
105

6

WORK, ENERGY AND POWER
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
6.11
6.12

Introduction
Notions of work and kinetic energy : The work-energy theorem Work
Kinetic energy
Work done by a variable force
The work-energy theorem for a variable force
The concept of potential energy
The conservation of mechanical energy
The potential energy of a spring
Various forms of energy : the law of conservation of energy
Power
Collisions

CHAPTER

114
116
116
117
118
119
120
121
123
126
128
129

7

SYSTEM OF PARTICLES AND ROTATIONAL MOTION
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10...