The hook is attached to a cord which is wound around the drum. If it moves from rest wit...

The hook is attached to a cord which is wound around the drum. If it moves from rest with an acceleration of 20 ft/s², determine the angular acceleration of the drum and its angular velocity after the drum has completed 10 rev. How many more revolutions will the drum turn after it has first completed 10 rev and the hook continues to move downward for 4 s?