In a Little League baseball game, the 145 g ball enters the strike zone with a speed of 13.0 m/s. The batter hits the ball, and it leaves his bat with a speed of 21.0 m/s in exactly the opposite direction.
1. what is the magnitude of the impulse delivered by the bat to the ball.
2. If the bat is in contact with the ball for 1.5ms , what is the magnitude of the average force exerted by the bat on the ball?