1. The problem statement, all variables and given/known data For the truss find the reactions at point A and B. For pulley, find the relation bet acc of A and block B. 2. Relevant equations 3. The attempt at a solution For the truss, take moments at B. F212 + NA12=F110 NA=-2kN which is wrong. Where did I go wrong? ans is -4800N. For pulley, if A moves down by x, then top movable pulley move up by 0.5x which is the same for the bottom pulley. Block B must then move by dist x. Since disp a = disp b, acc a= acc b I do not know the actual answer.