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A steel wire og lrngth 1 m and diameter...

A steel wire og lrngth 1 m and diameter 3 mm is stetched horizontally between supports attached at its ends .What load would be required to be hung from the mid -point of the wrie would be required to produeced a depression of 1 cm?
`(y=2xx10^(11) NM^(-2), g=9.8 ms^(2))`

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The correct Answer is:
`1.15kg`
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