Two blocks of masses m and M are connected by means of a metal wire of cross-sectional area A passing over a frictionless fixed pulley as shown in the figure. The system is then released. If M = 2 m ,

Question

Two blocks of masses m and M are connected by means of a metal wire of cross-sectional area A passing over a frictionless fixed pulley as shown in the figure. The system is then released. If M = 2 m , then the stress produced in the wire is:

TestHub · Accepted Answer

Tension in the wire, T = ( m + M 2 mM ​ ) g Stress ​ = Area Force / Tension ​ = A ( m + M ) 2 mM ​ g = A ( m + 2 m ) 2 ( m × 2 m ) g ​ ( M = 2 m given ) = 3 mA 4 m 2 ​ g = 3 A 4 mg ​ ​

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