1. The problem statement, all variables and given/known data 2. Relevant equations Mo=Fd Mo=r x F 3. The attempt at a solution Alright guys, I did the whole process but I'm pretty sure I just made a little bump somewhere in my calculations which screwed up my answers. First I found everything I could find OA = 350j, so the unit vector of OA is 1j OB = ( 350sin(33°) )i + ( 350 + 350cos(33°) )j = 191i + 644j tan(θ) = (300/350), θ = 40.6° AC = √(300)^2 + (350^2) = 461 mm OC = 461 sin(33°+40.6°) + (350 + 461cos(33°+40.6°), = 442i + 480j Then, AB = OB - OA = 191i + 644j -350j = 191i + 294j Unit vector of AB = 0.545i + 0.839j Given force is F = 130k AC = OC - OA = 442i + 130j Vector Approach: MA = AC x F = (442i + 130j) x (130k) = 16900i -57460j In the position of AB = MA * Unit vector AB MAB = 39000 N * mm MOA = MA ⋅ Unit vector OA = (16900, -57460) ⋅ (0,1,0) = 57500 N * mm Scalar Approach: MAB = F x d = 130 x 300 = 39000 N * mm h = AC sin (40.6° + 33°) = 461 sin (73.6°) = 442 mm MOA = F x h =130 x 442 =57500 N * mm My answers match, so I'm not sure where I went wrong, any help would be greatly appreciated!