Hey guys... This problem is driving me bonkers. I really am not asking you to calculate anything but I only ask how to figure out how to get r to use τ = r x F . My professor did not even teach us anything about resultants and 3-d moments :grumpy: 1. The problem statement, all variables and given/known data 2. Relevant equations MO= τ = r X F 3. The attempt at a solution Well, I found that the resultant F = 288.55 i + 985.97 j + 437 k . The resultant is CORRECT. I can not figure out how to get the distance of this vector in respect to x, y , z for r so I can use the cross product to figure out the moment. ...Or perhaps I have approached the problem all wrong? Is there a different way to solve the problem? ( please do not use any numbers just to make it easier on you) The book makes no mention of how to solve this problem and it is so so frustrating because even the professor has not done any problems pertaining to this question.