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Simple Pendulum

The period of...

Question

The period of pendulum is $3.00$ seconds. How long is the pendulum?

A

3.00 m

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B

0.333 m

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C

1.52 m

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D

3.27 m

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E

2.24 m

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Solution

The correct option is D $2.24 m$
Given : $T = 3.00$ seconds
Time period of pendulum $T = 2 π \sqrt{\frac{l}{g}}$
$∴$ $3.00 = 2 π \sqrt{\frac{l}{9.8}}$ $⟹ l = 2.24$ m

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