Q. 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
Explanation
(a) When lift falls freely effective acceleration and frequency of oscillations become zero
$g_{eff} = 0 \Rightarrow T^{'} = \infty,$ hence a frequency $= 0$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.