Yes, I meant C. Too late to go and fix it now. Good catch
23 karma · joined June 16, 2010
pulleys: idealized, massless, frictionless
rope: idealized, massless, doesn't stretch
weights: resting on ground.
As tension is applied to the rope, Weight A will be lifted first, until it is lifted to the ceiling. Then Weight B, and finally Weight A.It helps to visualize Weight A as being massless. In that case, there would just be extra slack in the rope, and B&C would not move until the slack was taken in.
I baulked at 'What is our goal?" since that is the first question I ask after someone requests help. But if I am expected to already be acquainted with the situation, I wouldn't ask.