A small bob attached to a light inextensible thread of length `l` has a periodic time `T`
Channel: Doubtnut
Date: 16/08/2020

A small bob attached to a light inextensible thread of length `l` has a periodic time `T` when  allowed to vibrate as a simple pendulum. The thread is now suspended from a fixed end `O` of a vertical  rigid rod of length `(3l)/(4)` (as in figure). If now the pendulum performs periodic oscillations in this arrangement, the periodic time will be-