The triangular plate is fixed at its base, and $A$ is given a

horizontal displacement of $s^{\text{'}}=3mm.$ Suppose that

$L=900mm.$

$($Figure $1)$

Figure

Part A

Determine the average normal strain $lo{n}_x$ along the $x$ axis.

Express your answer in millimeters per millimeter to three significant figures.

$lo{n}_x=$

$m\frac{m}{m}m$

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