I've attached an image. The question states:
Replace the three forces shown, with an equivalent force-couple system at point O(origin).
I've got a little ways, but I am stuck at the couple. I don't know how to use the distance in the couple. Need to know what distance to use, and from where.
R = Fx + Fy
C = Mo = ra/o x Fa + rb/o x Fb + rc/o x Fc(is this correct, or do I use x and y?)---this is the part where I'm stuck.
magnitude C = sqrt(Cx^2 + Cy^2)
The Attempt at a Solution
Fx = 200cos60 + 300cos45 + 250cos30 = 528.6 i
Fy = 200sin60 + 300sin45 - 250sin30 = 260.3 j
R = 528.6 i + 260.3 j
C = Mo = ???
Am I correct up to this point too?
View attachment sample exam1.bmp