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Homework Help: HELP Impulse problem

  1. Nov 11, 2008 #1
    HELP!!!Impulse problem

    1. The problem statement, all variables and given/known data
    A bullet of mass m and speed v passes through a pendulum bob of large mass M and emerges with speed v/2. the bob is at the end of a sting of length l.What impulse is delivered to the bob by the bullet in this case.


    3. The attempt at a solution
    impulse=momentum change=P_f-P_i
    therefore,
    impulse=(m(v/2)+Mv')-mv

    However, I don't think it is the final answer for this question, but I don't really know how to continue... can anyone help me with this question? thank you very much.
     
  2. jcsd
  3. Nov 11, 2008 #2

    djeitnstine

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    Gold Member

    Re: HELP!!!Impulse problem

    I see nothing is wrong. The bullet comes in with v while the bob has v=0 then the bullet exits with v/2 and then the bob has a velocity of v' (or some velocity v)
     
  4. Nov 12, 2008 #3
    Re: HELP!!!Impulse problem

    thank you very much. I am just making sure.
     
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