1. The problem statement, all variables and given/known data 2 equal masses (massA, massB) are raised up a pulley, at a constant velocity. massB has a velocity twice as fast as massA. What is the force acting on these 2 masses? 2. Relevant equations 3. The attempt at a solution If it is a constant velocity, the upwards force must be equal to mg correct? So Fa=mg, Fb=mg. But if this is the case, how is it possible massB moves twice as fast as massA with out an additional force acting on it? I am confused, can anyone out there help me please?