A ball hits the floor and rebounds after an inelastic collision. In this case

Options

A. the momentum of the ball just after the collision is the same as that just before the collision
B. the mechanical energy of the ball remains the same in the collision
C. the total momentum of the ball and the earth is consrved
D. the total energy of the ball and the earth is conserved

Answer

C

Explanation

Her we consider the ball and earth as one system.Since so external forces act during collision the total momentum is conserved.