The spool has a weight of 30 lb and a radius of gyration kO = 0.45 ft. A cord is wrapped...

The spool has a weight of 30 lb and a radius of gyration k_O = 0.45 ft. A cord is wrapped around the spool's inner hub and its end subjected to a horizontal force P = 5 lb. Determine the spool's angular velocity in 4 s starting from rest. Assume the spool rolls without slipping.