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Force system resultant

  1. Oct 31, 2012 #1
    1. The problem statement, all variables and given/known data
    http://i.imgur.com/NcI8y.png?1

    So i did A and got the answer of Fr to be {-129i, -221j} N
    and the Mra = -354k Nm

    which are right from the answer key

    so now about part b I think I should balance all moment at the G point about z axis or something like that thus according to

    M = Fd

    shouldn't I be able to get the x & y distances by dividing Mr by Fr to yield d since moments just have to balance out
    so i did
    354/129 = y = 2.74
    254/221 = x = 1.60
    which aren't the right answers D: (supposed to be G(+2.23, + 1.07, 3)

    heeelp D:
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Nov 1, 2012 #2

    Simon Bridge

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    Well if Mr=d.Fr then yes. Is that the relationship?
     
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