Self$-$Graded Truss Problem $-$ Submission $2$

The purpose of this problem is to build on what you learned in class and the online homework, to

clear$-$up any possible misconceptions and increase your knowledge in $2-$D equilibrium equations,

drawing FBDs$,$ calculating reactions and internal forces in different truss configurations, etc. The

numerical answers are provided, with the goal for you to retry as needed, figure out any mistake,

until you get the correct answer, while consulting with your classmates, the LA or the instructor.

However, the final submission should be your own.

A made$-$up truss structure is given below. It is pin supported at point A and supported by rollers at points

C and N $.$ For your convenience the truss is shown again next page.

Determine the forces in the following members: $BO,BC,QR,RW,WF,$ and $EF.$ meters

long$)$

Solution: $BO=6\mathrm{.}25kN(T),BC=3\mathrm{.}75kN(C),QR=90\mathrm{.}8kN(C),RW=20\mathrm{.}2kN(C),WF=20\mathrm{.}2kN(T),$

and $EF=72\mathrm{.}9kN(T)$