Q44 of 146 Page 145

Explain by an example that a body may possess energy even when it is not in motion.

The water in a tank on the roof of a building possesses potential energy due to its position (height) above the ground.


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42

How much work is done when a force of 1 N moves a body through a distance of 1 m in its own direction?

 43

A car is being driven by a force of 2.5 × 1010 N. Travelling at a constant speed of 5 m/s, it takes 2 minutes to reach a certain place. Calculate the work done.

 45

On what factors does the gravitational potential energy of a body depend?

 45

Give one example each of the body possessing: (i) kinetic energy, and (ii) potential energy.