A horizontal disc of mass M and radius R rotates freely

Last updated: 6/8/2023

A horizontal disc of mass M and radius R rotates freely about a vertical axis through its centre with angular velocity Aring of same mass M and radius R is now gently placed on the disc After some time the two rotates with a common angular velocity A some friction exists between the dise and the ring B the angular momentum of the disc plus ring is conserved about the mentioned axis of rotation C the final common angular velocity is o 3 2 D rd of the kinetic energy lost into heat