Question

A Circular ring having mass M = 4m and radius R is attached to a small smooth ring of mass m kept at point A. The ring is threaded onto a horizontal a horizontal fixed frictionless wire. Intially the bigger ring is held horizontally alongside the wire in such a manner that initially the planes of both the rings are at 90degrees to each other and planes of smaller and bigger rings are perpendicular to the plane of the paper (x-y plane). Now the bigger ring is released from rest. After release the planes of smaller and bigger ranges remain perpendicular to the plane of paper (x-y plane). Find the speed at point B

Answer 1

Explanation:

please see the attached picture dear