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Baseballs and impulses

  1. Oct 12, 2007 #1
    [SOLVED] baseballs and impulses

    1. The problem statement, all variables and given/known data

    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?

    2. Relevant equations

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

    3. 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!
     
  2. jcsd
  3. Oct 12, 2007 #2

    Doc Al

    User Avatar

    Staff: Mentor

    You changed 21.9 to 0.0219!
     
  4. Oct 12, 2007 #3
    wow. I guess I got a little carried away converting units. Thanks!!
     
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