Question

Initially, a block is sliding on a rough horizontal surface and after sometime it comes to rest, which of the following is true

• A. When the body is sliding, kinetic friction was acting on the body and when the body stopped moving, static friction was acting on the body
• B. When the body is sliding, static friction was acting on the body and when the body stopped moving, kinetic friction was acting on the body
• C. Both static and kinetic friction are acting on the body while sliding
• D. When the body is sliding, kinetic friction was acting on the body and when the body stopped moving, there is no friction

Answer 1

The correct option is D When the body is sliding, kinetic friction was acting on the body and when the body stopped moving, there is no friction

When the body is in motion, kinetic friction tries to oppose the motion. When the body is at rest, no attempt is being made to move the object, so no friction will act on the body