I have a doubt in repetitive collision problem. A spherical mass m is striking the ground from a height h. The coefficient of restitution b.w ground and the spherical ball is e. If n collisions take place before coming to rest. 1)What is the total distance covered by the spherical ball before coming to rest. (There is no friction between ground and the ball. ) 2) Total number of collisions 3)the total time taken after n collisions. 4)the total change in momentum after n collsions.