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Homework Help: Tennis ball impulse problem

  1. Nov 15, 2005 #1
    hi,
    I am trying to solve this problem.

    A tennis ball of mass m=0.060kg and speed v= 25m/s strikes a wall at a 45 degree angle and rebounds with the same speed at 45 degree. What is the impulse given to the ball?

    Do i need to break velocity into its components. Please suggest me a hint, thanks.
     
  2. jcsd
  3. Nov 15, 2005 #2
    Yes you do need to break velocity into components. If there is no friction (a sensible assuption in this case), would the rebound affect the vertical component of the velocity?

    Hope this helps,
    Sam
     
  4. Nov 15, 2005 #3
    Once you break it into components use the impulse-momentum theorem:

    [tex]\int\mathbf{F}\,dt=m\mathbf{v}_f-m\mathbf{v}_i[/tex]
     
  5. Nov 15, 2005 #4
    impulse


    Thanks for replying. I wish i could draw the diagram. Is there a way that i can insert the diagram. Plz let me know
     
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