1. The problem statement, all variables and given/known data The 87 kg painter in the figure below is using a large stepladder. The base of the ladder is 3 m wide, and the ladder is 7 m high. The painter is on a step that is 2.0 m above the floor. The horizontal bar of the ladder has a mass of 12 kg, and the entire ladder has a mass of 90 kg. Assume that the floor is frictionless. http://puu.sh/cqbjn/de2f114817.png [Broken] 2. Relevant equations sum of torque f=ma 3. The attempt at a solution I would assume the forces at hinge b is different than the forces at hinge a since the man is on the side of hinge B and more importantly the bar has a mass so it's not massless thus the tension on both side shouldn't be the same... however on the answer key the reaction force on both hinges are the same. http://puu.sh/cqbxK/5bfb197a8b.png [Broken] Can someone explain why the forces on both hinges the same??