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Homework Help: Statics (smooth pin reaction + tension)

  1. Feb 10, 2010 #1
    1. The problem statement, all variables and given/known data
    See figure.

    2. Relevant equations
    [tex] \sum F_{x} = 0 [/tex]
    [tex] \sum F_{y} = 0 [/tex]
    [tex] \sum M = 0 [/tex]

    3. The attempt at a solution
    See figure (written in my writing).

    Are the tensions A and B suppose to be the same? I imagine not because they are at different angles so they have different magnitudes but at the same time tension should be constant over the smooth pulley.

    I'm having trouble solving the tension in ADB.

    Any ideas?

    Attached Files:

    Last edited: Feb 10, 2010
  2. jcsd
  3. Feb 12, 2010 #2


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    Homework Helper

    In a single cable different segments must have the tension.
    T*sinθ1*x1 + Τ*sinθ2*x2 = F*x3.
    Now solve for T.
    The reaction on the pin is ΣTx.
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