Investigators studying the effect of hitting a soccer ball with the head are using a force plate to look at the forces in ball collisions; the force when the ball hits a player’s head will be similar. A 0.43 kg ball is launched at a force plate at 16 m/s. Smoothed data for the force versus time for the collision are shown in Figure P9.12. At what speed does the ball rebound from the plate?

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Force (N) 3000- 2000 1000 0 2.0 FIGURE P9.12 4.0 6.0 8.0 Time (ms)