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Homework Help: Dynamic motion involving pulleys and friction.

  1. Feb 15, 2010 #1
    1. The problem statement, all variables and given/known data
    http://img689.imageshack.us/img689/2315/dynamicsproblem.jpg" [Broken]

    2. Relevant equations


    3. The attempt at a solution

    FC = FfB
    mC * 9.81 = (6.0)(9.81)(0.30)
    mC = 1.8 <---- :(

    Obviously that was wrong haha. I then tried to figure out how the pulley affects the relationships of the forces, and figured:

    FfB = MC(9.8-aA)
    17.6 = MC(9.8-aA) <-----One equation, two unknowns. Need another equation, assuming this one is correct.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Feb 16, 2010 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi DaftCrunk! Welcome to PF! :smile:
    Yup! … try F = ma for A-and-B. :wink:
     
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