a ball of mass 4kg falls to the floor; it lands with aspeed of 6 m/s. it bounce s off with the same speed. show that it's momentum has changed by 48 m/s.
Momentum = mass x velocity
Initial momentum = 4kg x 6 m/s = 24 kg m/s
Final momentum = 4kg x 6 m/s = 24 kg m/s
Change in momentum = Final momentum - Initial momentum
Change in momentum = 24 kg m/s - 24 kg m/s = 0 kg m/s
Therefore, the momentum of the ball has not changed by 48 m/s.