In a little league baseball game, the 145 g ball enters the strike zone with a speed of 17.0 m/s . the batter hits the ball, and it leaves his bat with a speed of 25.0 m/s in exactly the opposite direction. what is the magnitude of the impulse delivered by the bat to the ball? if the bat is in contact with the ball for 1.0 ms , what is the magnitude of the average force exerted by the bat on the ball?