If the work done by stretching a wire by \( 1 \mathrm{~mm} \) is \( 2 \mathrm{~J} \), the work n....

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If the work done by stretching a wire by \( 1 \mathrm{~mm} \) is \( 2 \mathrm{~J} \), the work necessary for stretching another wire of the same
\( \mathrm{P} \)
material but with double the radius of cross section and
W
half the length by \( 1 \mathrm{~mm} \) is (in joule)?


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