At the instant pictured in Figure P4.12, the load L has an upward acceleration of 5 m/s2 , and point A of the hoisting cable has an upward velocity of 2.1 m/s (not necessarily constant). Point O is the center of the pulley shaft mounted on the hook housing. Tasks:
(a) Determine the angular velocity and angular acceleration of the pulley.
(b) Determine the acceleration of point B on the pulley
