Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsMechanical Properties of Solids1 Mark
Question
Which is more elastic: rubber or steel?
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Answer
Steel is more elastic than rubber as the Young's modulus of elasticity of steel is more than rubber. $\because\text{Y}_\text{r}=\frac{\text{Fl}}{\text{a}\Delta\text{l}_\text{r}}\ \text{and}\ \text{Y}_\text{S}=\frac{\text{F}}{\text{a}}\frac{\text{l}}{\Delta\text{l}_\text{S}}$ $\therefore\frac{\text{Y}_\text{S}}{\text{Y}_\text{r}}=\frac{\Delta\text{l}_\text{r}}{\Delta\text{l}_\text{S}}>1$ Since for the same applied force, the extension in rubber is more than the extension in steel.
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