A thin uniform rod of length l and mass m is freely pivoted about its end. The rod is initially held horizontally and released from rest. When the rod is vertical, an impulse J is applied to bring it to rest (this is in addition to any impulse provided by the pivot)
The minimum impulse J required to bring it to rest:
(A) m√gl/3
(B) 2m√(3g/l)
(C) m√(g/3l)
(D) √(2g/3l)
