Question

A simple pendulum is attached to the roof of a lift. If time period of oscillation, when the lift is stationary is T. Then frequency of oscillation, when the lift falls freely, will be

• A. Zero
• B. T
• C. 1/T
• D. None of these

Answer 1

Answer: (A)

Zero

Answer 2

When lift falls freely effective acceleration and frequency of oscillations be zero

$g_{eff} = 0$ ⇒ $T^{'} = \infty$, hence a frequency = 0.