Tiwari Academy Discussion

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

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

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

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?

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

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.

What is the work done by the force of gravity on a satellite moving round the earth? Justify your answer.

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.

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.

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

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?

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?

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