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NCERT Solutions for Class 9 Science Chapter 11

NCERT Solutions for Class 9 Science Chapter 11 - Work and Energy

Vedantu.com - No.1 online tutoring company in India provides you the Free PDF download of NCERT Solutions for Class 9 Science (Physics) Chapter 11 - Work and Energy solved by Expert Teachers as per NCERT (CBSE) Book guidelines. All Chapter 11 - Work and Energy Exercise Questions with Solutions to help you to revise complete Syllabus and Score More marks. Register Online for Class 9 Science tuition on Vedantu.com to score more marks in your examination. Vedantu is a platform that provides free NCERT Solutions and other study materials for students. Maths Students who are looking for better solutions ,They can download Class 9 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations.


NCERT Solutions for Class 9 Science Chapter 11 Work and Energy part-1
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FAQ (Frequently Asked Questions)

Q 1: Give a brief overview of the chapter Work and Energy.

Ans: The chapter of work and energy is substantially based on the principle which says – the kinetic energy of a body is directly proportional to the amount of work done on the body. The work done is, in turn, caused as a result of the force acting on the body. Similarly, the vice-versa also stands true – kinetic energy decreases with a decrease in force.


You will get a clear idea on these three terms – work, energy and force. A clear understanding of both potential energy and kinetic energy is essential to go deeper into the chapter where it deals mostly with kinetic energy.

Q 2: What are the main concepts that are covered in this chapter?

Ans: Initially, the chapter focuses on the work done when a force acts on a body. 

  • Work is said to be done only in case when there is a displacement of the body on which force is being applied.

  • You need to multiply the force with displacement to find the amount of work done on that particular body.

The main concepts that are covered in this chapter are:

  • Word done

  • Energy

  • Kinetic energy

  • Work energy theorem

  • Factors affecting kinetic energy

  • Potential energy

  • Law of conservation of energy

  • Power

  • The scientific conception of work

  • Rate of doing work

  • Commercial unit of energy 

Q 3: How many exercise questions are there in this chapter?

Ans: There are a total of 5 exercises in this chapter. 

  • Exercise 11.1 carries 1 question which is based on work and power

  • Exercise 11.2 carries 4 questions which are based on energy and units of energy. 

  • Exercise 11.3 carries 3 questions which are based on forms of energy. 

  • Exercise 11.4 carries 4 questions which are based on kinetic energy and its expression. 

  • Exercise 11.5 carries 21 questions which are based on conservation of energy and potential energy and its expression.

Q 4: How will Vedantu’s NCERT solutions of class 9 science chapter 11 Work and Energy will help us?

Ans: Solutions to the exercise questions are drafted by our science experts as per the recent guidelines provided by the CBSE and NCERT. We have framed the solutions in a bit by bit manner to make your learning process and preparation simple and easy to understand. We have given all the relevant exams and diagrams to the questions with real-life examples. 


Our NCERT solutions are in a structured way which helps you in building up a strong base of conceptual knowledge. We always make sure that all the main topics and sub-topics are covered from each and every chapter and we also have designed these solutions in a way to make your learning process more fun, fascinating and enjoyable.

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