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
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a
T
b
T4
c
2T5
d
2T5
answer is C.
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Detailed Solution
In stationary lift T=2πlgIn upward moving lift T'=2πl(g+a)(a= Acceleration of lift) ⇒T'T=gg+a=gg+g4=45 ⇒T'=2T5
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