# Reif 2.9

## Homework Statement

Let a wire's tension increase quasi-statically from $$F_{1}$$$$\rightarrow$$$$F_{2}$$, with Young's Modulus $$Y$$, Cross-sectional Area $$A$$, and Length $$L$$. Find the work done

## Homework Equations

$$F=\frac{YA}{L}$$ *Delta L, tex having issues
W= Integral from L to L_2

## The Attempt at a Solution

W = YA*Integral[dL/L]
W = YA ln(L_2/L)

Question is if the length changes then the cross-sectional area should also change and would require this to be a double integral, 2nd question would be if I even thought about the first integral in the right way.

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vela
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