Rachit Aggarwal

Asked: October 28, 2020In: Class 9

A battery lights a bulb. Describe the energy changes involved in the process.

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-3

Rachit Aggarwal

Asked: October 28, 2020In: Class 9

Certain force acting on a 20 kg mass changes its velocity from 5 m s^–1 to 2 m s^–1. Calculate the work done by the force.

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-4

Rachit Aggarwal

Asked: October 28, 2020In: Class 9

A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain 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-158 Questions No-5

Rachit Aggarwal

Asked: October 28, 2020In: Class 9

The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy? 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-158 Questions No-6

Rachit Aggarwal

Asked: October 28, 2020In: Class 9

What are the various energy transformations that occur when you are riding a bicycle?

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-7

Rachit Aggarwal

Asked: October 28, 2020In: Class 9

Does the transfer of energy take place when you push a huge rock with all your might and fail to move it? Where is the energy you spend going?

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-8

Rachit Aggarwal

Asked: October 28, 2020In: Class 9

A certain household has consumed 250 units of energy during a month. How much energy is this in joules?

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-9

Rachit Aggarwal

Asked: October 28, 2020In: Class 9

An object of mass 40 kg is raised to a height of 5 m above the ground. What is its potential energy? If the object is allowed to fall, find its kinetic energy when it is half-way down.

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-10

Rachit Aggarwal

Asked: October 28, 2020In: Class 9

What is the work done by the force of gravity on a satellite moving round the earth? 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-158 Questions No-11

Rachit Aggarwal

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