## Physics: Principles with Applications (7th Edition)

Find the amount of stretch by using equation 9–4. $$\Delta \mathcal{l}=\frac{1}{E}\frac{F}{A}\mathcal{l}_o$$ $$=\frac{1}{3 \times 10^9 N/m^2}\frac{275 N}{\pi (0.0005 m)^2}(0.300m)$$ $$=3.5 \times 10^{-2}m$$