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Homework Help: Ratio of power

  1. Mar 14, 2015 #1
    1. The problem statement, all variables and given/known data
    Part C:
    http://imgur.com/mFlXGZs [Broken]

    2. Relevant equations
    Power = τω

    3. The attempt at a solution
    P1/P2 = τ1ω1/τ2ω2 = (T1/T2) * (ω1/ω2)
    T1/T2 is found in part B: r1/r2
    (ω1/ω2) = vr1/vr2 (velocities are the same) = (r1/r2)
    (r1/r2)*(r1/r2) = (r1)^2/(r2)^2

    The answer is 1.
    Last edited by a moderator: May 7, 2017
  2. jcsd
  3. Mar 14, 2015 #2


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    Check this. See part (A). (ω1/ω2) ≠ vr1/vr2
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