# A body of mass 2 kg attached to a string is whirled in a vertical circle of radius 5 m. The minimum speed of the body at lowest point so that the cord does not slacken even at the highest point is

Question : A body of mass 2 kg attached to a string is whirled in a vertical circle of radius 5 m. The minimum speed of the body at lowest point so that the cord does not slacken even at the highest point is

(A) $15.65ms^{-1}$

(B) $6.75ms^{-1}$

(C) $45.83ms^{-1}$

(D) $20.87ms^{-1}$