Question

On rubbing hands, we feel warm. Explain, why?

Answer 1

Force of friction

1. The opposing force generated when one surface slides on the other are termed the force of friction.

Explanation:

1. When we rub our hands together, a force of friction is generated.
2. The force of friction causes the molecules to move faster.
3. When the molecules move faster, they have more energy and hence produce heat.

On rubbing hands, we feel warm due to the force of friction which produces heat.