Physics

Problem

A ball of mass

2.0 \text{ kg}

rolling on a horizontal floor with a speed

4.0 \text{ m s}^{-1}

hits a vertical wall. Calculate the magnitude of the change in momentum of the ball if it (a) bounces with speed

4.0 \text{ m s}^{-1}

(b) bounces with speed

3.0 \text{ m s}^{-1}