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Homework Help: Conceptual question on momentum

  1. Oct 19, 2007 #1
    1. The problem statement, all variables and given/known data

    An astronaut is on a space walk when his tether breaks. He has no rocket pack, only a big wrench. How does he get back to the ship?

    2. Relevant equations


    3. The attempt at a solution

    I have no idea. I imagined him using the wrench as some sort of "paddle" as he space-canoed his way back to the ship. Any more realistic ideas?
  2. jcsd
  3. Oct 19, 2007 #2


    User Avatar
    Homework Helper

    Think conservation of linear momentum. paddle won't work because there's only empty space there... nothing to push against.
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