18.5 CONSERVATION OF ENERGY 481 EXAMPLE 18.7 The wheel shown in Fig. 18-19a has a weight of 30 lb and a radius of gyration of kg = 0.6 ft. It is attached to a spring which has a stiffness k = 2 lb/ft...

Extracted text: 18.5 CONSERVATION OF ENERGY 481 EXAMPLE 18.7 The wheel shown in Fig. 18-19a has a weight of 30 lb and a radius of gyration of kg = 0.6 ft. It is attached to a spring which has a stiffness k = 2 lb/ft and an unstretched length of 1 ft. If the disk is released from rest in the position shown and rolls without slipping, determine its angular velocity at the instant G moves 3 ft to the left. k = 2 lb/ft 4 ft