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Pulley question

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

    Hey guys.
    Look at this pulley system, I wrote down all the equations.
    The pulley on the left is massless, the one on the right has the mass of m3 and radius R.
    I also wrote the the torque equation of the pulley and the thing I don't understand is the what is the acceleration of the pulley (a3), is it equal to a2 or to a1?
    Thanks a lot.

    2. Relevant equations



    3. The attempt at a solution
     

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  3. Nov 1, 2008 #2

    Doc Al

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    Staff: Mentor

    Aren't m2 and m3 (the pulley) attached?
     
  4. Nov 1, 2008 #3
    Oh, you right...:blushing:
    Thanks.
     
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