[SOLVED] Really simple Moment Edit: So I have solved this, but still need some help, skip to post #4 or#5 where I have questions concerning cross-product. I would love to talk about some more questions about cross product too if I get any responses. Thanks! I just need a check. My answer seems logical to me, but it does not match the solution. I am supposed to find the moment of the force at A about P. Now I am using the component r that is perpendicular to a component of F. I tried (4sin30+6)(12/13)(520)=3840 but the solution is 3150 N*m. Am I correct or is my technique flawed?