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A pendulum has time period T. If it is taken on to another planet having acceleration due to gravity half and mass 9 times that of the earth then its time period on the other planet will be

a
T
b
T
c
T1/3
d
2T

detailed solution

Correct option is D

T=2πlg⇒T∝1g⇒TPTe=gegP=21⇒T'=2T

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