Question

a tennis player receives a shot with the ball (0.0600 kg) traveling horizontally at 52.0 m/s and returns the shot with the ball traveling horizontally at 32.0 m/s in the oppposite direction.

Answer 1

so the ball has momentum p = mv = 0.0600 kg * 52.0 m/s in one direction and after being hit by the player has momentum p = mv = - 0.0600 kg * 52.0 m/s in the opposite direction, as indicated by the minus sign here. the difference in momentum is \(\Delta p = m \Delta v\) = 0.0600 kg (52.0 - (-32.0))m/s