Answer:
\[{{\text{Y}}_{\text{e}}}\text{=}\,\frac{\text{(strees)}}{\text{longitudinal}\,\,\text{strain}}\]
\[\therefore
\] \[\,\frac{{{Y}_{s}}}{{{Y}_{r}}}=\,\frac{{{(strees)}_{s}}}{{{(strees)}_{r}}}.\]
Since, \[{{Y}_{s}}>\,{{Y}_{r}}\]
\[\therefore
\] \[{{(\text{strees})}_{s}}\,>\,{{(\text{strees})}_{r}}\]
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