1. The problem statement, all variables and given/known data A pulley fixed to a rigid support carries a rope whose one end is tied to a ladder and a man and the other end to the counterweight of mass M. The man of mass m climbs up a distance of h with respect to the ladder and then stops. If the mass of the rope and the friction in the pulley axle are negligible find the displacement of the center of mass of the system. 3. The attempt at a solution The external forces acting on the system are: 1. The tension due to the fixed support=2T where T is the individual tension in each segment of the rope. 2. Mg and mg due to gravity The thing is that I dont know whether mass m and M are equal. If no then how do they counterbalance each other? The question does not even mention whether the man goes up with an acceleration or constant velocity?? Please help.