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Tension with 2 Pulleys

  1. Mar 3, 2013 #1
    1. The problem statement, all variables and given/known data
    Calculate the tension T in case a, b, and c if acceleration = 0.

    Ws = weight of the bottom pulley
    W = weight of the weight

    2. Relevant equations
    mg - T = m*a

    3. The attempt at a solution

    For a, it just seems like T = Ws + Wm since the bottom pulley is connected to the top pulley.

    For b, the force is being redirected by the pulley.

    For c, two masses are balanced along the pulley yet only the tension of one mass is measured.
     

    Attached Files:

  2. jcsd
  3. Mar 3, 2013 #2

    haruspex

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    Take a close look at the small pulley in the lower block. How many arrows point up from it? What force does each of those arrows represent?
     
  4. Mar 3, 2013 #3
    Just figured it out. Thanks!
     
    Last edited: Mar 3, 2013
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