ball of mass (m) 0.5 kg is attached to the end of a string having length
(L) 0.5 m. The ball is rotated on a horizontal circular path about vertical
axis. The maximum tension that the string can bear is 324 N. The
maximum possible value of angular velocity of ball (in radian/s) is
(A) 9 (B) 18
(C) 27 (D) 36