Question

When a moving body is suddenly stopped, then:

• A. Frictional force increases.
• B. Friction force remains same as it was while the car was moving.
• C. Friction force reduces but has a non zero value.
• D. Frictional force reduces to zero as it is a self adjusting force.

Answer 1

The correct option is D Frictional force reduces to zero as it is a self adjusting force.

Frictional force arises when there is a relative motion between two surfaces. When body is stopped means there is no relative motion and no resultant force is there hence frictional force acting becomes zero.