Fundamental Problem $8\mathrm{.}5$

Consider the truss shown in $($Figure $1).AE$ is constant. Assume that $AE$ is in kN $.$ Use the principle of virtual work to solve this problem

Figure

$1$ of $1$

Part A

Determine the horizontal displacement of joint $D$ measured rightward.

Express your answer in terms of A and $E.$ Express the coefficients using three signifi value if the displacement is rightward and a negative value if the displacement is leftw

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