QUESTIONS:

Please select only one selective question.

Question $1(60$ Points $-$ Selective$)$:

In figure $1,$ a planar truss system is given. According to the given:

a$)$ Find out the global rigidity matrix of the truss member.

b$)$ Find out the force vector.

c$)$ Find out the displacements.

d$)$ Find the element's stresses.

e$)$ Find the reactional forces.

f$)$ Comment that, why do we use truss elements? What are the advantages of truss

elements? Can you give a real life examples?