Four masses (each of \( \mathrm{m} \) )are placed at the vertices o...

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Four masses (each of \( \mathrm{m} \) )are placed at the vertices of a regular pyramid (triangular base) of side 'a'. Find the work done by the system while taking them apart so that they form the pyramid of side ' \( 2 a^{\text {'. }} \)
\( \mathrm{P} \)
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