Originally Posted by

**Katzenjammer** I've been racking my brain on this question for hours now, and I can't seem to get it. It's as follows:

"Find the work done by the force **F**(x,y) = (x + 2y)**i** + (6y - 2x)**j** acting counterclockwise once along the triangle with vertices (1,1), (3,2) and (1,4)."

A classmate thinks this should equal out to zero since it's a closed triangle and there isn't any ultimate displacement, but we cannot get it to work when we try solving it.

Can somebody offer any help?

Thanks in advance.