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Homework Help: Magnitude of the impulse

  1. Nov 15, 2008 #1
    1. The problem statement, all variables and given/known data
    A ball of mass 0.4 kg is initially at rest on the
    ground. It is kicked and leaves the kicker’s
    foot with a speed of 5.0 m/s in a direction 60◦
    above the horizontal.
    The magnitude of the impulse k~Ik imparted
    by the ball to the foot is most nearly



    3. The attempt at a solution

    I=change(p)
    pf-pi
    mvf-mvi
    (0.4)(5cos60)-(0.4)(0)
    =1 N*s
    Where did I go wrong in the problem?
     
  2. jcsd
  3. Nov 15, 2008 #2
    Re: Impulse

    WOW how weird we posted the same problem near the same time as each other o_O

    Do you go to Bellaire by any chance?

    (BTW check my topic, I'm not sure I'm right but I did it differently than you)
     
  4. Nov 15, 2008 #3
    Re: Impulse

    Ha, that's really weird. No, I go to Connally. I don't know if the angle would matter or if it just would be the velocity itself. I got it wrong when I did it.
     
  5. Nov 15, 2008 #4
    Re: Impulse

    Ok, I was right, just ignore the angle :D
     
  6. Nov 15, 2008 #5
    Re: Impulse

    Ok, thanks!
     
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