Question

A copper rod with length $1.4$m and area of cross-section of $2c{m}^2$ is fastened to a steel rod with length L and cross-sectional area $1c{m}^2$. The compound rod is subjected to equal and opposite pulls of magnitude $6.00\times {10}^4$ N at its ends.
What is the strain in each rod? $[Y_{steel}=2\times {10}^{11}Pa;Y_{CU}=1.1\times {10}^{11}Pa]$.

Answer 1

${\epsilon }_C=\frac{{\sigma }_C}{Y_C}=2.7\times {10}^{-3}$;

${\epsilon }_S=\frac{{\sigma }_S}{Y_S}=3.0\times {10}^{-3}$.