A weightless thread can support tension upto 30 N. A stone of mass 0.5 kg is tied to it and is revolved in a circular path of radius 2 m in a vertical plane. If g = 10 ms-2 , then the maximum angular velocity of the stone will be
(A) 5 rad/s
(B) \(\sqrt{30}\) rad/s
(C) \(\sqrt{60}\) rad/s
(D) 10 rad/s
