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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a
2 sec
b
1 sec
c
Zero
d
∞
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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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?