1. The problem statement, all variables and given/known data http://imageshack.us/photo/my-images/851/45009287.png/ The problem(s) are shown in the link, but I'm having trouble getting them started. 2. Relevant equations 3. The attempt at a solution For 3-12: I think what I need to do is find the tension force in the ropes leading from each block to point A. Then with those forces I find the Sum of the forces in X and Y From there i think i know what to do, its just that i dont know how to find the force in each rope! My attempt: For block B, the force in the the rope to point A is sin∅/200lb. For block C, the force in the rope to point a is sin(30)/100 =50lb . Is this correct so far?