Work is not done while reading a book.

The energy possessed by a body due to its motion is called potential energy.

Sun, wind and coal are renewable sources of energy.

Water is non-renewable.

In which of the following cases the work is said to be done?

Which of the following is a renewable source of energy?

Which of the following is a man-made source of energy?

A stone kept on top of a building has energy.

is moving air.

Hydro energy and wind energy are used for producing .

The vast amount of energy obtained from the sun is called .