Young modules = \( \frac{\text{Tensile stress}}{\text{Tensile strain}}\) = \( 1.1 \times 10^11 = \frac{7.7 \times 10^7}{\text{Tensile Strain}} \) ∴ Tensile strain = \( \frac{7.7 \times 10^7}{1.1 \times 10^11} \) = \( 7.0 \times 10^{7-11} = 7.0 \times 10^{-4} \)

A copper wire was subjected to a tensile stress of \(7.7\times10^7\,\text{N m}^{-2}\). Calculate the strain of the wire. [Young's modulus = \(1.1\times10^{11}\,\text{N m}^{-2}\)]

Earlier discussion