1. The problem statement, all variables and given/known data [PLAIN]http://img208.imageshack.us/img208/5445/problem3.png [Broken] All problem info contained in the image. 2. Relevant equations equations of relative motion? 3. The attempt at a solution Frankly I am stuck on where to begin. I would normally make a free body diagram, but doing this alone doesn't seem to get me very far. I would also usually start making position vectors and work my way through velocities and accelerations point by point; however, those problems are always asking me to find velocities or accelerations at a particular point. This is asking for the reaction forces and moments at A and B. The way the picture looks makes me think the weight of the plate will be concentrated at the center and going vertically downward. Any hints on where to begin?