A ring of radius R is first rotated with an angular velocity omega_(0) and then carefully placed on a rough horizontal surface. The coefficient of friction between the surface and the ring is mu. Time after which its angular speed in reduced to half is

A ring of radius R is first rotated with an angular velocity omega_(0)

1.	A ring of radius R is first rotated with an angular velocity omega_(0) and then carefully placed on a rough horizontal surface. The coefficient of friction between the surface and the ring is mu. Time after which its angular speed in reduced to half is
Answer» `(omega_(0)MU R)/(2G)` `(omega_(0)mu R)/(2MU R)` `(2omega_(0)R)/(mu g)` `(omega_(0)R)/(2mu g)` Answer :D