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Homework Help: Momentum, Impulse

  1. Feb 18, 2010 #1
    1. The problem statement, all variables and given/known data
    A steel ball with mass 0.347 kg falls onto a hard floor and bounces. Its speed just before hitting the floor is 23.6 m/s and its speed just after bouncing is 12.7 m/s. (a) What is the magnitude of the impulse of the ball?


    2. Relevant equations
    J=pf-pi


    3. The attempt at a solution
    J=.347kg(12.7m/s)-.347kg(-23.6m/s)
    J=12.6kg*m/s
     
    Last edited: Feb 18, 2010
  2. jcsd
  3. Feb 18, 2010 #2
    Please take note of the direction of the momenta that you are considering.
     
  4. Feb 18, 2010 #3
    Would anybody check this new answer?
     
  5. Feb 18, 2010 #4
    Looks correct to me :)
     
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