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Conservation of momentum with friction?

  1. Nov 13, 2007 #1
    1. The problem statement, all variables and given/known data
    We know that momentum is supposed to be conserved in this collision. We observe, however, that the pucks eventually come to a stop, at which point they have zero momentum. Give a solid explanation (using the law of conservation of momentum) for this apparent violation of the law of conservation of momentum.
  2. jcsd
  3. Nov 13, 2007 #2


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    What causes a change in momentum?
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