Cameroon GCE A-Level Physics

Practice session

A steel wire of length $2.5\text{ m}$ and cross-sectional area $1.0 \times 10^{-6}\text{ m}^2$ is stretched by a force of $200\text{ N}$. If Young's modulus for steel is $2.0 \times 10^{11}\text{ N m}^{-2}$, what is the extension produced in the wire?

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