A 2.5-lb disk of radius 4 in. is attached to the yoke BCD by means of short shafts fitted in bearings at B and D. The 1.5-lb yoke has a radius of gyration of 3 in. about the x axis. Initially the assembly is rotating at 120 rpm with the disk in the plane of the yoke (θ = 0). If the disk is slightly disturbed and rotates with respect to the yoke until θ = 90°, where it is stopped by a small bar at D, determine the final angular velocity of the assembly
