A 0.145- kg baseball traveling 38.30 m/s is stopped in 0.193 s by a catcher's mitt. What is the average acceleration of the ball? ____What is the average force on the catcher's mitt? ___A 0.145- kg baseball with an initial speed of 24 m/s rebounds with a speed of 35 m/s after being struck with a bat. If the duration of contact between ball and bat was 2.3 ms, what was the magnitude of the average force between ball and bat?