Physics - Elasticity Question with Solution | TestHub

Longitudinal strain is defined as the change in length divided by the original length.$$\text{Longitudinal strain}=\frac{\Delta L}{L}$$ Given $\Delta L=0.75\text{ mm}=0.75\times 10^{-3}\text{ m}$ and $L=1.5\text{ m}$.$$\text{Longitudinal strain}=\frac{0.75\times 10^{-3}\text{ m}}{1.5\text{ m}}=0.5\times 10^{-3}=5\times 10^{-4}$$

The longitudinal strain is $5\times 10^{-4}$. The integer answer is 5.