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Need help Dynamic Problem: Plane Kinetic of rigid bodies.

  1. May 3, 2012 #1
    1. The problem statement, all variables and given/known data

    The central moments of inertia of the gears A and B as shown are 10 kg.m2 and 20 kg.m2, respectively. If the mass of the block C is mC = 50 kg and the system is released from rest, determine alpha A of the gear A

    fig is attached


    2. Relevant equations




    3. The attempt at a solution

    I can compute alpha B from the data but how can to compute alpha A? I mean is there an equation related between them?

    By the way, about alpha B, did my equation correct?

    20 alphaB = 0.15 T
    T - Wc = -mC aC
    aC = alphaB x 0.15

    thx for your helps!!
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
  3. May 3, 2012 #2
    Hint:

    They are gears so they rotate and accelerate at different speeds. Determine relationship.
     
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