\(rx=5ft+0.5+\cos30º\)
\(ry=0.5ft\sin30º\)
\(fx=600\ lb\ \cos20\)
\(fy=600\ lb\sin20\)
\(M_{o\ }=\left(rx\ Fy-ry\ Fx\right)\)
\(=\left\{\left(5.43\right)\left(205.21\right)-\left(0.25\right)\left(563.81\right)\right\}\)
\(\left(1,114.29\right)-\left(140.95\right)\)
\(M_o\ 973.34\ MN\)
Problema #2 
FORMULAS
\(M\)O \(R\times F\ \left(3D\right)\)
\(M\)\(\left(Rx-RyFx\right)\left(2D\right)\)