# Do you know about Poisson's ratio?

A solid copper cyinder of length $$50 \text{ cm}$$ is placed b a horizontal surface and subjected to a vertical compressive force of $$1200 \text{ N}$$ directed downwards and distributed uniformly over the end face. If the resulting change of the volume of th cylinder is $$1.5 \times 10^{-3} \text{ mm}^3$$. Find the Poisson's ratio of copper.

Details and assumption

Young's modulus of copper is $$120 \times 10^{9} \text{ N/m}^2$$

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