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Homework Help: Period time

  1. Oct 16, 2008 #1
    1. The problem statement, all variables and given/known data

    As you can see, I have a ball inside a ball.
    One with a density p1 and the other p2.
    the ball stand on a surface with friction so it can move with out sliding.
    they move the ball from its rest point and release it.
    I need to figure out the period time, any idea?


    2. Relevant equations



    3. The attempt at a solution
     

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  3. Oct 16, 2008 #2

    tiny-tim

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    Hi asi123! :smile:

    (is there zero friction between the balls?)

    The only way to approach this is to work out the equations of its motion first.

    Hint: lots of things are being conserved. :wink:
     
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