A simple pendulum , a physical pendulum, a torsional pendulum and a spring-mass systeam, each of same frequency are taken to the Moon. If frequencies are measured on the moon, which systeam of systeams will have it unchanged?

Options

A. only spring-mass system
B. spring-mass system and torsional pendulum
C. spring-mass system and physical pendulum
D. none of these

Answer

B

Explanation

Both the spring-mass system & torsional pendulum have no dependence on gravitational acceleration for their times periods.