1. The problem statement, all variables and given/known data The leg and cast in the figure below weigh 210 N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w1 weighs 140 N. Determine the weight w2 and the angle α needed so that no force is exerted on the hip joint by the leg plus cast. 2. Relevant equations 3. The attempt at a solution I do not even know where to begin.