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Need help with body diagram and moment?

  1. Nov 27, 2013 #1
    1. The problem statement, all variables and given/known data

    Untitled_zpseabfa304.png

    2. Relevant equations

    M=FA

    Equlibrium condition=
    net Fy=0
    net Fx = 0
    Total Moment=0


    3. The attempt at a solution
    I need help with the body diagrem

    The D circle thing is what? is that a roller?
     
  2. jcsd
  3. Nov 27, 2013 #2
    Yes, I also think so. The structure hinges at A and in order to compensate for its expansion it can roll over the supporting surface at D. The cable is there to raise it.
     
  4. Nov 27, 2013 #3
    photo1_zps28ed9b30.jpg

    Did i draw correctly?
     
  5. Nov 27, 2013 #4
    It seems so,yes. I am also not sure if there should be a force at D since it seems you would not be able to solve it if there is a force present at that point.
     
  6. Nov 27, 2013 #5
    I think you should assume there is no force at D. Maybe it is not a bridge and it is a pulley at end D.
     
  7. Nov 27, 2013 #6

    PhanthomJay

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    That is how I see it also. No support at D.
     
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