Q: 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× 10^{11} N/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)

(a) 500

(b) 1000

(c) 2000

(d) 3000

Ans: (b)