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Centripetal Force

The time peri...

Question

The time period of a second's pendulum is 2 sec. The spherical bob which is empty from inside has a mass of 50 gm. This is now replaced by another solid bob of same radius but having different mass of 100 gm. The new time period will be

A

4 sec

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B

1 sec

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C

2 sec

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D

8 sec

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Solution

The correct option is C
2 sec

T = $2 π \sqrt{\frac{l}{g}}$ ( independent of mass )

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