A 100g steel ball falls from a height of 1.8m on to a metal plate and rebounds to a height of 1.25m, find The p. e of the ball before the (fall g=10m/s2)
Its k. e as it hits the plate
Its velocity on hitting the plate
Its k. e as it leaves the plate on the rebound
Its velocity if rebound

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.