A pendulum of length is released from rest at a height above its lowest point
PHYSICS · Single correct · CBSE · Physics · Laws of Motion · Laws of Motion
Problem
A pendulum of length r is released from rest at a height H above its lowest point. The bob moves in a vertical circle attached to a light, inextensible string. What is the minimum value of H that allows the string to remain taut as the bob passes through the highest point of its path? Neglect air resistance.
(a) 2r
(b) 1.5r
(c) 2.5r
(d) 3r