# Physic

A 135 g baseball traveling at a speed of 36 m/s a bat and moves back along its incoming trajectory with a speed of 47 m/s.

a) What is the impulse delivered to the ball by the bat? (Answer: 11.2kg * m/s)

b) If the duration of the bat-ball collision is 7 x 10^-4s, what is the average force exerted by the bat on the ball during this period? (Answer: 160000N)

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1. a. Impulse = 0.135*(36+47) = 11.2

b. a = (V2-V1)/t
a = (47-(-36))/7*10^-4 = 118,571 m/s^2.

F = m*a = 0.135 * 118,571 = 16,007 N.

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