Question:
A steel wire and a copper wire of equal length and equal cross-sectional area are joined end to end and the combination is subjected to a tension. Find the ratio of (a) the stresses developed in the two wires and (b) the strains developed. Y of steel = $2 \times 10^{11} \mathrm{~N} / \mathrm{m}^{2}$, Y of copper $=1.3 \times 10^{11} \mathrm{~N} / \mathrm{m}^{2}$.
Solution:
