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 earth is conserved
D. the total mechanical energy of the ball and therth is conserved

Answer

C

Explanation

`d = h+2h_(1)+2h_(2)+…….` and `h_(n)=e^(2n)h`