# NCERT Solutions for Class 11 Physics Chapter 6 Work Energy and Power

NCERT Solutions for Class 11 Physics Chapter 6 Work Energy and Power: consider the situation that you are carrying a 10 Kg stationeries in your hand and you are not moving. After some time your hand will get pain. In this situation, you are doing work physically according to you. But in Physics, there is no work or you are doing zero work. Can you find why work is zero here? The NCERT Solutions for Class 11 Physics Chapter 6 Work Energy and Power introduces the concepts of work and types of work, the relation between work and energy and the concept of power. In NCERT Solutions for Class 11 Physics Chapter 6, you will study about conservation of energy (energy can be neither created nor be destroyed). For example, when water is coming through a pipe the potential energy of water stored in a tank at height is converted to kinetic energy. When we switch a fan the fan rotates, where the electrical energy is converted to mechanical energy. Can you find out more examples of conservation of energy?.

To understand briefly about the work done by a force let's consider a situation as shown in the figure

Here weight mg is acting downwards and force and displacement are in the upward direction. Here the work done by the gravitational force is negative since displacement is opposite to gravity. The work done by force F is positive since F and displacement are in the same direction. The NCERT Solutions for Class 11 Physics Chapter 6 explains many other physical and mathematical aspects of work.

The main topics of the NCERT Solutions for Class 11 Physics Chapter 6 Work Energy and Power are listed below:

6.1 Introduction

6.2 Notions Of Work And Kinetic Energy: The Work-energy Theorem

6.3 Work 6.4 Kinetic Energy

6.5 Work Done By A Variable Force

6.6 The Work-energy Theorem For A Variable Force

6.7 The Concept Of Potential Energy

6.8 The Conservation Of Mechanical Energy

6.9 The Potential Energy Of A Spring

6.10 Various Forms Of Energy: The Law Of Conservation Of Energy

6.11 Power

6.12 Collisions

Another important topic of the NCERT Solutions for Class 11 Physics Chapter 6 is the collisions. Some of the main points of the topic collisions are listed below.

• For an  elastic collision Law of conservation of momentum and that of Kinetic Energy holds good
• For inelastic collision Law of conservation of momentum hold good but kinetic energy is not conserved
• Coefficient of restitution is the ratio of relative velocity after the collision to relative velocity before the collision
• For a perfectly elastic collision coefficient of restitution is one
• For inelastic collision coefficient of restitution is less than one
• For a perfectly inelastic collision coefficient of restitution is zero

We provide you with NCERT Solutions for Class 11 Physics Chapter 6 Work Energy and Power below:

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## NCERT Solutions for class 11 Physics

 Chapter-1 Physical world Chapter-2 Chapter-3 Chapter-4 Chapter-5 Chapter-7 Chapter-8 Chapter-9 Chapter-10 Mechanical Properties of Fluids Chapter-11 Chapter-12 Chapter-13 Kinetic Theory Chapter-14 Chapter-15

## NCERT Solutions for Class 11- Subject wise

 NCERT solutions for Class 11 Biology NCERT solutions for Class 11 Maths NCERT solutions for Class 11 Chemistry NCERT solutions for Class 11 Physics