## College Physics (4th Edition)

The change in the ball's momentum is $-20.0~kg~m/s$
We can find the change in velocity: $\Delta v = v_f-v_0 = (-2.0~m/s)-(2.0~m/s) = -4.0~m/s$ We can find the change in the ball's momentum: $\Delta p = m~\Delta v$ $\Delta p = (5.0~kg)(-4.0~m/s)$ $\Delta p = -20.0~kg~m/s$ The change in the ball's momentum is $-20.0~kg~m/s$.