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A girl swinging on a swing in sitting po...

A girl swinging on a swing in sitting position suddenly stands up. The period of swing then will be :

A

increased

B

decreased

C

the same

D

none of these.

Text Solution

Verified by Experts

The correct Answer is:
B
When the girl stands up then centre of gravity moves up and hence length of pendulum is decreased. As T `prop sqrt(l)`. So time period also decreases.
Hence the correct choice is (b).
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