A second's pendulum is working in a lift. If the lift begins to fall freely towards the earth, what will be the time period of the pendulum in this case?

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2 sec

1 sec

Zero

∞

answer is D.

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Detailed Solution

For a simple pendulum , T = 2πlge . When the lift is freely falling , ge = g-g = 0 . Therefore T = ∞

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