Class 4 Force, Work and Energy question answer


Very Short Answer type questions.

(i) What does a bowler use when he throws a ball?

Ans. The Bowler use force when he throw a ball.

(ii) What forces is applied when a rolling ball slows down and then slope?

Ans. Frictional Force

(iii) What is the main source of energy?

Ans. Sun light is the main source of energy.

(iv) How is heat energy used?

Ans. Heat energy is used to cook food for change water to steam.

(v) What happens when a tube light is switched on?

Ans. When a tube light is switched on it produces light.

(vi) What is a turbine?

Ans. Turbines produce elictrical energy

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