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Need help with a problem(Energy and Momentum)

  1. Feb 19, 2009 #1
    1. The problem statement, all variables and given/known data
    I don't even know where to start, completely lost. Can someone at least get me started on this thing?!?!

    A 3g bullet with a speed of 300m/s passes right through a 400g block suspended on a long cord. The bullet imparts an impulse to the block and a speed of 1.5m/s

    1. draw a picture

    2. what is the speed of the bullet after it leaves the block?

    3. how high does the block rise after the bullet passes through?

    4. what is the work done by the bullet by passing through the block?

    5. if the bullet did not pas through the block but instead lodged in the block, what would be the velocity of the block and the bullet after the collision?
  2. jcsd
  3. Feb 19, 2009 #2
    Start with the conservation of momentum, m1v1=m2v2 (the v's are vectors but since in this case its a linear problem it doesn't matter)
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