# physics

a baseball (m = 153 g) approaches a bat horizontally at a speed of 41.0 m/s (92 mi/h) and is hit straight back at a speed of 45.8 m/s (102 mi/h). If the ball is in contact with the bat for a time of 1.05 ms, what is the average force exerted on the ball by the bat? Neglect the weight of the ball, since it is so much less than the force of the bat. Choose the direction of the incoming ball as the positive direction.

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1. force*time= mass(change velocity)
= mass(-45.8- (+41))= -mass*86.5
solve for force

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2. Thanks. I was messing up the change in velocity part

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posted by Kelsey

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