A stone is dropped at t=0. A second stone, with 3 times the mass of the first, is dropped from the same point at t=130 ms. (a) How far below the release point is the center of mass of the two stones at t=260 ms? (Neither stone has yet reached the ground.) (b) How fast is the center of mass of the two-stone system moving at that time? (a) Number (b) Number eTextbook and Media Units Units

A stone is dropped at t=0. A second stone, with 3 times the mass of the first, is dropped from the same point at t=130 ms. (a) How far below the release point is the center of mass of the two stones at t=260 ms? (Neither stone has yet reached the ground.) (b) How fast is the center of mass of the two-stone system moving at that time? (a) Number (b) Number eTextbook and Media Units Units