PLS answer part B Consider the truss shown in $($Figure $1).$ Assume the members are pin connected at their

end points. Take $A=140m{m}^2$ and $E=200$GPa for each member.

igure

$={\displaystyle \underset{?}{\overset{?}{}}}\frac{nNL}{AE}$

$={\displaystyle \underset{?}{\overset{?}{}}}N(\frac{\text{d}\text{e}\text{l}\text{N}}{\text{d}\text{e}\text{l}\text{P}})\frac{L}{AE}$

$={\displaystyle \underset{?}{\overset{?}{}}}\frac{\text{N}\text{A}\text{E}}{nL}$

$={\displaystyle \underset{?}{\overset{?}{}}}N(\frac{\text{d}\text{e}\text{l}\text{N}}{\text{d}\text{e}\text{l}\text{P}})\frac{AE}{L}$

Correct

Part B

Determine the vertical displacement of joint $C$ measured downward. Use Castigliano's theorem.

Express your answer to three significant figures and include the appropriate units. Enter positive value

${}_{C_v}=[,]$

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