3.7a Selected Problem Answers

Question 1

(a) $F_{AB}=\SI{-195}{kN}$ (C), $F_{BD}=\SI{170}{kN}$ (T)

(b) $F_{AC}=\SI{-350}{kN}$ (C), $F_{CD}=\SI{170}{kN}$ (T)

(c) $F_{CF}=\SI{-241}{kN}$ (C), $F_{EF}=\SI{200}{kN}$ (T)

(d) $F_{CF}=\SI{-140}{kN}$ (C), $F_{BD}=\SI{214}{kN}$ (T)

(e) $F_{AC}=\SI{-66.8}{kN}$ (C), $F_{DE}=\SI{103}{kN}$ (T)

Question 2

(a) $F_{EC}=\SI{-71.8}{kN}$ (C), $F_{ED}=\SI{115}{kN}$ (T)

[ERROR (b) $F_{DB}=\SI{-9.42}{kN}$ (C), $F_{DF}=\SI{143}{kN}$ (T)]

(c) $F_{BC}=\SI{-104}{kN}$ (C), $F_{KL}=\SI{81.1}{kN}$ (T)

(d) $F_{EF}=\SI{-33.4}{kN}$ (C), $F_{DF}=\SI{119}{kN}$ (T)