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Work and Energy 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?

By Quick Guide Team / March 19, 2026

Work and Energy Class 9

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

By Quick Guide Team / March 19, 2026

Work and Energy Class 9

The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy? Why?

By Quick Guide Team / March 19, 2026

Work and Energy 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.

By Quick Guide Team / March 19, 2026

Work and Energy 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.

By Quick Guide Team / March 19, 2026

Work and Energy Class 9

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

By Quick Guide Team / March 19, 2026

Work and Energy Class 9

An object thrown at a certain angle to the ground moves in a curved path and falls back to the ground. The initial and the final points of the path of the object lie on the same horizontal line. What is the work done by the force of gravity on the object?

By Quick Guide Team / March 19, 2026

Class 9, Physics

A stone is dropped from the top of a tower 500 m high into a pond of water at the base of the tower. When is the splash heard at the top? Given, g = 10 m s–2 and speed of sound = 340 m s–1

By Quick Guide Team / March 5, 2026

Class 9, Latest Jobs, Physics

What is sound and how is it produced?

By Quick Guide Team / February 8, 2026

Sound is the form of wave energy that travels through a medium such as solids, liquids and gases.

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