A simple pendulum is suspended from the roof of a lift. If the lift accelerates downwards with an ac

Question

A simple pendulum is suspended from the roof of a lift. If the lift accelerates downwards with an acceleration $g$ (free fall), what is the time period of the pendulum?

Professor PC Thomas Classes · Answer

In free fall, the effective acceleration due to gravity $g_{eff} = g - g = 0$. The time period $T = 2\pi\sqrt{L/g_{eff}} 	o \infty$.