When the load on a wire is slowly increased from 3 to 5 \( \mathrm{kg} \) wt, the elongation inc...

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When the load on a wire is slowly increased from 3 to 5 \( \mathrm{kg} \) wt, the elongation increases from \( 0.61 \) to \( 1.02 \mathrm{~mm} \). The work done during the extension of wire is
(1) \( 0.16 \mathrm{~J} \)
(2) \( 0.016 \mathrm{~J} \)
(3) \( 1.6 \mathrm{~J} \)
(4) \( 16 \mathrm{~J} \)
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