A simple pendulum; a physical pendulum; a torsional pendulum and a spring–mass system, each of same frequency are taken to the Moon. If frequencies are measured on the moon, which system or systems will have it unchanged?
Text Solution
Verified by ExpertsThe correct answer is:
B
For simple pendulum T = 2 π 
For physical pendulum
T = 2 π 
(g–change) I,m, λ → const
For Torsional pendulum
T = 2 π 
for any planet
For spring mass system T = 2 π 
∴ mg = k λ 
Both the spring–mass system & torsional pendulum have no dependence on gravitational acceleration for their frequencies.
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