A ring of mass M and radius R lies flat on a horizontal table. A light thread is wound around itand its free end is pulled with a constant velocity v. (a) Two small segment A and B (see fig.) in the ring are rough and have a coefficient of friction muwith the table. Rest of the ring is smooth. Find the speed with which the ring moves. (b) Find the speed of the ring if coefficient of friction is mueverywhere, for all points on the ring.

A ring of mass M and radius R lies flat on a horizontal table. A light

1.	A ring of mass M and radius R lies flat on a horizontal table. A light thread is wound around itand its free end is pulled with a constant velocity v. (a) Two small segment A and B (see fig.) in the ring are rough and have a coefficient of friction muwith the table. Rest of the ring is smooth. Find the speed with which the ring moves. (b) Find the speed of the ring if coefficient of friction is mueverywhere, for all points on the ring.
Answer» ANSWER :(a) `(V)/(2)` (B) `(v)/(2)`