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Collision help

  1. Oct 17, 2006 #1
    Two blocks are free to slide along a frictionless wooden track. A block of mass m1=5 kg is released from point A. Protruding from its front end is the north pole of a strong magnet, repelling the north pole of an identical magnet embedded in the back end of the block of mass m2=10 kg, initially at rest. The two blocks never touch. Calculate the maximum height to which m1 rises after the elastic collsion.

    m1 is initially at a height of 5 meters. I don't know what equation to use for this problem.
  2. jcsd
  3. Oct 17, 2006 #2


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    Assume convservation of energy.

    Balance momemtum before and after impact.
    Balance kinetic energy before and after impact.
  4. Oct 17, 2006 #3
    There must be some sort of diagram that goes with this? I believe there is information missing here.

    Edit: Though I guess if you work to make the problem meaningful, conservation of energy will make most other information unnecessary.
  5. Oct 17, 2006 #4


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    Yeh, I would figure that it is a (vertically) circular track, since m1 has a height and the question asks for a final height.
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