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Woman on a canoe

  1. Nov 1, 2005 #1
    i'm having a problem with this one:
    45kg woman is in a 60kg canoe of length 5m. They are initially at rest. she walks from a point 1m from the end to a point 1m from the other end where she stops. If resistance and the motion of the canoe in the water are ignored, how far does the canoe move during the process.

    I thought this was a center of mass problem, but the center of mass doesn't change because the woman begins at rest. i don't know where to start...
     
  2. jcsd
  3. Nov 1, 2005 #2

    Astronuc

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    Staff: Mentor

    How about conservation of momentum?

    Hint: the magnitude of velocity (speed) = distance/time, and the time is the same.

    Action-reaction.
     
    Last edited: Nov 2, 2005
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