How to Calculate Impulse and Average Force in a Baseball Bat Collision

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AI Thread Summary
To calculate the impulse delivered by a baseball bat to a ball, the formula used is p = m(vf - vi), where the mass of the baseball is 0.137 kg and its velocity changes from +21.9 m/s to -21.9 m/s. The calculated impulse is approximately 0.0060006 kg·m/s. To find the average force exerted by the bat, the formula F = delta p / delta t is applied, with the contact time being 1.45 ms. The resulting average force is approximately 4.14 N, although there was a mistake in unit conversion that caused initial confusion.
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[SOLVED] baseballs and impulses

Homework Statement



A 0.137-kg baseball traveling horizontaly is hit by a bat and its direction is exactly reversed. Its velocity changes from +21.9 m/s to -21.9 m/s. What is the magnitude of the impulse delivered by the bat to the ball (enter first). If the baseball is in contact with the bat for 1.45 ms, what is the average force exerted by the bat on the ball?

Homework Equations



P=m(vf-vi) and F=delta p/delta t

The Attempt at a Solution



p=.137(.0219-(-.0219))
p=.0060006 Part1 answer

F=.0060006/.00145s
F=4.14

However, the program we submit our answers to says that one or both of my answers is wrong. Please help!
 
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Vanessa23 said:
p=.137(.0219-(-.0219))
p=.0060006 Part1 answer
You changed 21.9 to 0.0219!
 
wow. I guess I got a little carried away converting units. Thanks!
 

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