Question

The surface of tyres are made rough. Why?

Answer 1

Reason for the roughness of the surface of tyres

1. The tyres of vehicles are provided with rough surfaces to increase the frictional force between the tyre and the road surface.
2. A rough tyre will provide a better grip as its offers more friction to the ground.

Key points

1. Frictional force is a type of contact force.
2. It starts to act whenever two surfaces are in contact with each other and starts to move over one another.