Question $1-$Graduate Attribute $($GA$)2$

$[30]$

For the plane truss structure shown in Figure $1$ determine the following using the direct stiffness method:

a$.$ The horizontal and vertical components of the displacement at node $1$

b$.$ The stress in each element

c$.$ Verify force equilibrium at node $1$

Let $A=6{10}^{-4}{m}^2$ for all elements, $E=70$GPa