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a ring of radius R is first rotated with an angular velocity w and then carefully placed sona rough horizontal surface.the coefficient of fiction b/w the surface and the ring is u.time after which angular speed is reduced to half is??

a ring of radius R is first rotated with an angular velocity w and then carefully placed sona rough horizontal surface.the coefficient of fiction b/w the surface and the ring is u.time after which angular speed is reduced to half is??

Grade:11

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