A spool with radius R = 3 ft is released from rest on an incline with θ = 30°, and its cen...

A spool with radius R = 3 ft is released from rest on an incline with θ = 30°, and its center, which coincides with its center of mass, is observed to reach a speed of 8 ft/s two seconds after release. If the spool rolls without slip, use the impulse-momentum principles to determine the radius of gyration of the spool kG.

Figure P8.86