A body is kept on a horizontal disc of radius 2 m at a distance of 1m from the centre. The coefficient of friction between the body and the surface of disc is 0.4. The speed of rotation of the disc at which the body starts slipping is (g = 10 m/s2)
(A) 2 rad/s
(B) 4 rad/s
(C) 0.2 rad/s
(D) 0.4 rad/s
