Question

The force required to overcome friction at the instant when an object starts moving from rest is a measure of its:

• A. static friction
• B. dynamic friction
• C. sliding friction
• D. rolling friction

Answer 1

The correct option is A static friction

when a body is in contact with another body and some normal force acts then if any force is applies on then which causes relative motion between them, a resisting force will act called frictional force. Up to a point when motion does not start the friction acting is called static friction, once the motion starts then resisting force acting slightly decreases [call dynamic friction force.

so the force required to overcome to start a motion is static frictional force.

so best possible answer is option A.