A spring balance is found to have a peri...

A spring balance is found to have a period of oscillation of 3.14 s, when a 12 kg weight is suspended from it. How much does the spring elongate when a 2 kg weight is suspended from it ?

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The correct Answer is:

0.4 m

`l=T^2g//4pi^2=3.14 ^2xx9.8//4pi^2=2.45m`

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