A blocked shot in basketball occurs when a defensive player legally deflects the ball from getting into the net. Consider a player blocking a 620-gg ball flying at 25 m/sm/s. (Figure 1) is a force versus time graph during the collision between the ball and the defender's hands. After the block, the ball bounces from the defender's hands in the direction opposite to the original one.

Determine the speed with which the ball bounces off the defender's hands.

F(N) 3000 2000 1000 t (ms) 10 20