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Amplitude of vibrations of simple pendul...

Amplitude of vibrations of simple pendulum is A. becomes `(A)/(3)` after 20 seconds. The amplitude after 60 seconds will be-

A

`(A)/(6)`

B

`(A)/(8)`

C

`(A)/(9)`

D

`(A)/(27)`

Text Solution

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The correct Answer is:
D
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