Priti Patel

Asked: October 28, 2020In: Class 9

Can there be displacement of an object in the absence of any force acting on it? Think. Discuss this question with your friends and teacher.

NCERT Solutions for Class 9 Science Chapter 11 Important NCERT Questions Work and Energy NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-158 Questions No-12

Priti Patel

Asked: October 28, 2020In: Class 9

A person holds a bundle of hay over his head for 30 minutes and gets tired. Has he done some work or not? Justify your answer.

NCERT Solutions for Class 9 Science Chapter 11 Important NCERT Questions Work and Energy NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-159 Questions No-13

Priti Patel

Asked: October 28, 2020In: Class 9

An electric heater is rated 1500 W. How much energy does it use in 10 hours?

NCERT Solutions for Class 9 Science Chapter 11 Important NCERT Questions Work and Energy NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-159 Questions No-14

Priti Patel

Asked: October 28, 2020In: Class 9

Illustrate the law of conservation of energy by discussing the energy changes which occur when we draw a pendulum bob to one side and allow it to oscillate. Why does the bob eventually come to rest? What happens to its energy eventually? Is it a violation of the law of conservation of energy?

NCERT Solutions for Class 9 Science Chapter 11 Important NCERT Questions Work and Energy NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-159 Questions No-15

Priti Patel

Asked: October 28, 2020In: Class 9

An object of mass, m is moving with a constant velocity, v. How much work should be done on the object in order to bring the object to rest?

NCERT Solutions for Class 9 Science Chapter 11 Important NCERT Questions Work and Energy NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-159 Questions No-16

Priti Patel

Asked: October 28, 2020In: Class 9

Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km/h?

NCERT Solutions for Class 9 Science Chapter 11 Important NCERT Questions Work and Energy NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-159 Questions No-17

Priti Patel

Asked: October 28, 2020In: Class 9

Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why?

NCERT Solutions for Class 9 Science Chapter 11 Important NCERT Questions Work and Energy NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-159 Questions No-19

Priti Patel

Asked: October 28, 2020In: Class 9

Find the energy in kW h consumed in 10 hours by four devices of power 500 W each.

NCERT Solutions for Class 9 Science Chapter 11 Important NCERT Questions Work and Energy NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-159 Questions No-20

Priti Patel

Asked: October 28, 2020In: Class 9

A freely falling object eventually stops on reaching the ground. What happenes to its kinetic energy?

NCERT Solutions for Class 9 Science Chapter 11 Important NCERT Questions Work and Energy NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-159 Questions No-21

Priti Patel

Which is the best website providing NCERT Solutions?

NCERT Books

Where can I get NCERT books in PDF format?

NIOS

NCERT Solutions

Sign Up

Sign In

Forgot Password

Tiwari Academy Discussion Latest Questions