Two blocks of masses \( \mathrm{m} \) and \( \mathrm{M} \) are connected by means of a metal wir....

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Two blocks of masses \( \mathrm{m} \) and \( \mathrm{M} \) are connected by means of a metal wire of cross-sectional area A
\( \mathrm{P} \)
passing over a frictionless fixed pulley as shown in the figure. The system is then released. If \( \mathrm{M}=2 \mathrm{~m} \), then the stress produced in the wire is :
W
(1) \( \frac{2 m g}{3 \mathrm{~A}} \)
(2) \( \frac{4 m g}{3 \mathrm{~A}} \)
(3) \( \frac{m g}{A} \)
(4) \( \frac{3 m g}{4 A} \)


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