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Figures (on mass center?)

  1. Feb 2, 2009 #1
    Hi all,

    I am trying to find two figures which contain the following:

    - The first one would be two skaters initially at rest on ice (ie, ideal no-friction-surface) facing each other and exchanging a ball. The exchange makes them further apart.

    - The second figure I would like to find is two skaters initially at rest on ice, but this time being back-to-back and exchanging a boomerang which makes them closer and closer.

    The figures do not need to be complicated, just simple figures that would be found in a textbook for example. Ideally in color, but if in black and white, this would be great too !

    Many thanks :D
  2. jcsd
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