Additional Problem $4$:

The rigid bar is pinned at A and supported by two aluminum rods, each having a diameter of $1$

in$.$ and a modulus of elasticity $E_{al}=10({10}^3)ksi.$ If the bar is initially vertical, $($a$)$ determine

the force in each rod when the $2-$kip load is applied, $($b$)$ calculate the stress in each rod and

$($c$)$ the deflection $($movement$)$ of Point B$.$ Note: To solve the problem draw a free body

diagram of just the rigid bar and write a sum of moments about point A equation. Also, using

similar triangles, write an equation that relates the movements of points C and E to each other

as the rigid bar rotates around A $($keep in mind that those movements will also be equal to the

deformation of the rods at those locations$).$ The moment and movement $($deformation$)$

equations should allow you to solve for the unknown forces.