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Question

A man measures the period of a simple pendulum inside a stationary lift and finds it to be T sec. If the lift accelerates upwards with an acceleration g/4, then the period of the pendulum will be


A

T

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B

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C

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D

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Solution

The correct option is C


In stationary lifr T = 2πlg

In upward moving lift T' = 2πl(g+a)

( a = Acceleration of lift )

TT=gg+a=g(g+g4)=45T=2T5


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