A ring (4 kg, r = 2 m) rotates in a CW direction with initialangular velocity 20 s-1. A disk (8 kg, r = 2 m) rotates in a CCWdirection with initial angular velocity 50 s-1. The ring and disk\"collide\" and eventually rotate together. Assume that positiveangular momentum and angular velocity values correspond to rotationin the CCW direction.
What is the initial angular momentum Li of the ring+disksystem?
What is the final angular velocity ωf of the ring+disksystem?
