Question

what is the time period of the seconds pendulum in the centre of earth
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Answer 1

Answer:

2 seconds......

Explanation: On the surface of the earth, the effective length of a pendulum should be 99.2 cm so that its time period becomes 2 seconds and hence, we call it a seconds pendulum. When we go the moon, the acceleration due to gravity decreases.

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Answer 2

Explanation:

As g=0 at the centre of the earth the time period become infinite as T=2pi/ underootg. gar at the centre of the earth,r=0 & hence g=0. Time period of a simple pendulum is T=2 sqrt (1/g)