Two 2.6-lb collars A and B can slide without friction on a frame, consisting of the horizontal

Question:

Two 2.6-lb collars A and 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 CD. The two collars are connected by a cord running over a pulley that is attached to the frame at O and a stop prevents collar B from moving. The frame is rotating at the rate 12 = θ rad/s and r = 0.6 ft when the stop is removed allowing collar A to move out along rod OE. Neglecting friction and the mass of the frame, determine, for the position r = 1.2 ft,

(a) The transverse component of the velocity of collar A,

(b) The tension in the cord and the acceleration of collar A relative to the rod OE.