Question F5.7: Determine the force in members BC, CF, and FE and state if t......
Determine the force in members BC, CF, and FE and state if the members are in tension or compression.
Step-by-Step
+\uparrow \Sigma F_{y}=0 ; F_{C F} \sin 45^{\circ}-600-800=0
\begin{array}{cl} & F_{C F}=1980 \mathrm{lb}(\mathrm{T}) \\ ⤹ +\Sigma M_{C}=0 ; & F_{F E}(4)-800(4)=0 \\ & F_{F E}=800 \mathrm{lb}(\mathrm{T}) \\ ⤹ +\Sigma M_{F}=0 ; & F_{B C}(4)-600(4)-800(8)=0 \\ & F_{B C}=2200 \mathrm{lb}(\mathrm{C}) \quad \text { } \end{array}
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