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? railroad car

  1. Apr 11, 2004 #1
    ?? railroad car

    doesnt make sense... here goes...

    A railroad car of weight W can roll without friction along a straight horizontal track. A man od weight w is standing on the acr which is moving at a speed of V1. Prove that change in v = w(v1 + Vrel)/W if Vrel is the speed of the man moving off the left end relative to the car. (car is going right, man is going left) thanks!
     
  2. jcsd
  3. Apr 11, 2004 #2

    Doc Al

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    Staff: Mentor

    Conservation of momentum

    Use conservation of momentum.
     
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