Originally Posted by

**lupy** oh man,

big thanks; I was way off.

I'm still confused for b: if the pivot is at the wrist, why is the force at the elbow in the same direction as that at the muscle, not the opposite?

EDIT: Sorry, think I get it now; it's the force acting on it, that's why it's in the same direction, right? So it's like the force at the muscle over the distance to the pivot, is equal to the force at the joint over the distance to the pivot, or 175/20 = x/25, to get the 218.75?

And then the parallelogram of forces is just pythagoras with the 2 also?

thanks again!