a 1.8-kg collar a and a 0.7-kg collar b can slide without friction on a frame, consisting of the horizontal rod oe and the vertical rod cd, which is free to rotate about its vertical axis of symmetry. the two collars are connected by a cord running over a pulley that is attached to the frame at o. at the instant shown, the velocity va of collar a has a magnitude of 2.1 m/s while a stop prevents collar b from moving. when the stop is suddenly removed collar b slides upward toward point o and collar a moves toward e. as collar a reaches a distance of 0.12 m from o, the magnitude of its velocity is observed to be 2.5 m/s. determine at that instant the magnitude of the angular velocity of the frame and the moment of inertia of the frame and pulley system about the vertical axis cd.