Force system resultant

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  • #1
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Homework Statement


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:

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
Simon Bridge
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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
Well if Mr=d.Fr then yes. Is that the relationship?
 

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