Dec 16, 2020 · A small stone of mass 200 g is tied to one end of a string of length 80 cm . Holding the other end in hand, the stone is whirled into a vertical circle What is the minimum speed that needs to be imparted at the lowest point of the circular path, so that the stone is just able to complete the vertical circle ? what would be the tension at the lowest point of circular path ? .