Question
Science Question on Force of Friction
Give examples to show that friction is both a friend and a foe.
Answer
Friction is both a friend and a foe due to following reasons:
Friction act as friend:
- We are able to walk because of frictional forces between ground and our feet.
- We are able to write because of friction between ball point and the paper surface.
- Nails and screws stick to wall surfaces because of friction.
- Lighting a match stick is because of friction between match stick and the side surface of match box.
Friction act as foe:
- Wear and tear of soles of our shoes is due to friction.
- When a tyre deflates, it is difficult to move the vehicle because of increased friction between the tyre and road surface.
- Machines gets heated up because of friction.
- Due to friction, machines and vehicles consumes more fuel and increase maintenance cost.