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A steel sprial spring has on unstreched ...

A steel sprial spring has on unstreched length of 8cm and when a mass is hung o it, its length becomes 10cm. Calculate the periodic time of the oscillation that would occur if the masss were displaced vertically.

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The correct Answer is:
`(1)/(6)pi^(2)hdelta^(3) Y//l=80J`
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