The force needed to stop a moving body in a definite time depends on: (a) mass of the body (b) velocity of the body (c) both (a) and (b) (d) none of these

both (a) and (b)

Reason — The force needed to stop a moving body in a definite time depends on the product of mass and velocity, which is called the linear momentum of the moving body. Thus, p = mv.