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Homework Help: Find tension in cables with forces acting on them.

  1. Oct 7, 2012 #1
    1. The problem statement, all variables and given/known data


    Assuming the pulley at D to be frictionless, determine the force values in cable members AC and BC due to the 300 N weight force for the system depicted in Fig. 3.

    2. Relevant equations

    F=ma (or F=mg)
    Sin cos and tan functions

    Not sure what else would be relevant here.

    3. The attempt at a solution

    I made the tension of the wire with the weight attached to be 300N (the force of the weight). From this i found:

    Total horizontal force at C = 289.778N
    Total vertical force at C = 77.646N

    At first I thought that if i halved the horizontal force (289.778/2 = 144.889) then I could use that to find each section separately, but I have a gut feeling that it won't work that way.... Help??
  2. jcsd
  3. Oct 7, 2012 #2


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