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Homework Help: Acceleration magnitude?

  1. Oct 28, 2005 #1
    I have a question in my serway physics book..
    The question goes like this:

    A 50g ball travelling at 25m/s bounces off a brick wall and rebounds at 22m/s. A high speed camera records this event. If the ball is in contact with the wall for 3.5ms what is te magnintue of te average acceleration of te ball durning this time interval..

    I tried using delta v over delta t to find the answer, but the answer is suppose to be : 1.34*10^4

  2. jcsd
  3. Oct 28, 2005 #2


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    The approach is correct and the answer it gives is indeed 13.4*10^3 m/s^2
  4. Oct 28, 2005 #3
    Ok , the orignal v is 25, and the final v is 22.
    The time is just .0035

    -3/.0035 ?
  5. Oct 28, 2005 #4


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    Where did the "3" come from?
  6. Oct 28, 2005 #5
    the change is 3 m/s
  7. Oct 28, 2005 #6
    Wait, Nevermind, I got it
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