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Math Help - 3-D Statics

  1. #1
    Member akhayoon's Avatar
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    3-D Statics

    1. The problem statement, all variables and given/known data
    IT IS POSTED IN THE ATTACHMENT BELOW


    2. Relevant equations
    everything is in static equilibrium


    3. The attempt at a solution

    well I know how to follow up to solution on these types of problems quite easily, however..on this one I can't seem to get started because I don't know where the weight of the of the pipe is located on the assembly...so

    1. i tried multiplying 20N/m by 6.5 (length of the pipe) I think that should give the value of the force

    2. I tried finding the centroid of the wire...but the centroid I found isn't even located on the pipe at all which really confused me

    so basically all I need to know is where this force is, so I could get started on the problem ...thanks
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  2. #2
    GAMMA Mathematics
    colby2152's Avatar
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    Why find the centroid? Just balance your forces in each plane and apply moments.
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  3. #3
    Member akhayoon's Avatar
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    sorry, I don't follow exactly...
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  4. #4
    Forum Admin topsquark's Avatar
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    Let's try a simpler problem with the same flavor. The picture below is of a mast (black) with a crossbar (red). The crossbar has a weight of 100 N. What is the tension in the support wire (blue)? (Let the length of the crossbar be 2 m.)

    -Dan
    Attached Thumbnails Attached Thumbnails 3-D Statics-mast.jpg  
    Last edited by topsquark; December 15th 2007 at 08:09 AM.
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