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?

# 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?

1. A

2 sec

2. B

1 sec

3. C

Zero

4. D

$\infty$

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For a simple pendulum , T = 2$\pi {\sqrt{\frac{l}{g}}}_{e}$ . When the lift is freely falling ,  . Therefore T = $\infty$