Each of three blocks shown in figure has a mass 3kg. The wire connecting, blocks A and B has area of cross-section 0.005 cm2 and Young's modulus of elasticity Y = 2×1011N/m2. Neglect friction. Find the elastic potential energy stored per unit volume in wire connecting blocks A and B in steady state (in j/m3 take g = 10m/s2)

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500

1000

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3000

answer is B.

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