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Crate on a cable statics question

  1. Aug 28, 2010 #1
    1. The problem statement, all variables and given/known data
    Please refer to the attachment.


    2. Relevant equations
    Sum of x and y forces = zero
    Sum of moments about any point = zero


    3. The attempt at a solution
    By looking at the portion of the string under the crate, there are 3 forces acting on it, namely the two tensions at the side and the weight of the crate. Hence I deduce that the gravitational force of the crate acting on the string is the sum of the two vertical components of the tensions.

    Can anyone tell me if I'm right or am I missing out on any forces?

    Please help, thanks much!
     

    Attached Files:

    Last edited: Aug 28, 2010
  2. jcsd
  3. Aug 29, 2010 #2

    Doc Al

    User Avatar

    Staff: Mentor

    You are correct. Next you'll have to use a little trig to find the angle that the cables make.
     
  4. Aug 29, 2010 #3
    oh i got the angle already, I was just confused as to whether there were any more forces acting on it. thanks for the clarification!
     
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