Find the best tutors and institutes for Class 9 Tuition

Find Best Class 9 Tuition

Please select a Category.

Please select a Locality.

No matching category found.

No matching Locality found.

Outside India?

Chapter 11 - Work and Energy

In previous chapters, you have covered topics like motion, force and gravitation and have a clear understanding of these concepts. In this chapter, you’ll study some more important terms such as work, energy and power and how these concepts are related to each other. It is interesting to know that we all need the energy to work and for our daily activities like running, reading, writing, cycling, dancing, swimming and so on. Whether machines or living organisms, all need energy in order to survive and work. In this chapter, you’ll study the actual meaning of ‘work’ in physics, various forms of energy, the law of conservation of energy and how energy is measured commercially.

Let’s take a look at topics and sub-topics of Class 9 Science Chapter 11, Work and Energy

11.1 Work

11.1.1 Not much ‘work’ in spite of working hard!

11.1.2 Scientific conception of work

11.1.3 Work done by a constant force

11.2 Energy

11.2.1 Forms of energy

11.2.2 Kinetic energy

11.2.3 Potential energy

11.2.4 Potential energy of an object at a height

11.2.5 Are various energy forms interconvertible?

11.2.6 Law of conservation of energy

11.3 Rate of doing work

11.3.1 Commercial unit of energy

In Class 9 Science Chapter 11, you will learn – 

Section 11.1 – In this section, you’ll learn what is the scientific meaning of ‘work’ and what is the difference between the term ‘work’ used in our daily lives in comparison to the way it is used in science with the help of some examples.

Section 11.2 – In this section, you’ll study what is energy all about and different forms of energy such as kinetic energy, potential energy, heat energy, light energy, electrical and chemical energy. You’ll also come across the law of conservation of energy.

Section 11.3 – In this section, you’ll acquire knowledge about what is power and the unit of power along with some solved examples. You’ll also learn about the commercial unit of energy and use of kilowatt-hour (kW h) in our day to day lives.

In this chapter, you are provided with several diagrams, activities and examples with their solutions for a clear understanding of Work and Energy. To know more about NCERT Solutions for Class 9 Chapter 11 you should explore the exercises mentioned in this chapter. You can also download the Work and Energy Class 9 Solutions PDF, solved by our science experts.


How helpful was it?

How can we Improve it?

Please tell us how it changed your life *

Please enter your feedback

Please enter your question below and we will send it to our tutor communities to answer it *

Please enter your question

Please select your tags

Please select a tag

Name *

Enter a valid name.

Email *

Enter a valid email.

Email or Mobile Number: *

Please enter your email or mobile number

Sorry, this phone number is not verified, Please login with your email Id.

Password: *

Please enter your password

By Signing Up, you agree to our Terms of Use & Privacy Policy

Thanks for your feedback

About UrbanPro helps you to connect with the best Class 9 Tuition in India. Post Your Requirement today and get connected. is India's largest network of most trusted tutors and institutes. Over 25 lakh students rely on, to fulfill their learning requirements across 1,000+ categories. Using, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 6.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more