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Impulse-Momentum Theorem: find the time for a falling object to increase its velocity

  1. Oct 16, 2008 #1
    1. The problem statement, all variables and given/known data
    Use the impulse-momentum theorem to find how long a falling object takes to increase its speed from 5.50 to 9.00 .


    2. Relevant equations
    deltaP = impulse
    P = momentum (m*v)
    impulse = J (integral from ti to tf)
    3. The attempt at a solution
    3.5 seconds, though, I knew before that it was incorrect.
     
  2. jcsd
  3. Oct 16, 2008 #2
    Re: Impulse-Momentum Theorem: find the time for a falling object to increase its velo

    well, I got it, now :)
    vf = vi + at
    -9 = -5.5 -9.8t
    solve for t = .357 seconds
     
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