Question #169718

Find the work done in stretching a wire of 1 sq. mm cross-section and 2 m long through 0.1 mm. Given that the Young’s modulus of the material of the wire is 2.0 × 1011 N/m2. 


1
Expert's answer
2021-03-14T19:14:45-0400
W=YAx22LW=2×1011106(104)22(2)=5104JW=\frac{YAx^2}{2L}\\W=\frac{2×10 ^{ 11} ⋅10^{ −6} ⋅(10 ^ {−4} ) ^ 2}{2(2)}=5 ⋅10 ^ {−4}J


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