Problem $4$:

Solve step by step using legible handwriting, if you wish you can use python. Explaining the transformation matrices, and writing the formulas

Solve Problem $6\mathrm{.}7$ for the combined effect of the loads shown in Fig. P$6\mathrm{.}7$ and settlement of support at joint of $12$ mm horizontally to the right and $18$ mm down vertically.

rig ro$.1$

All Members:

$E=200GP$

$A=60c{m}^2$

Using the stiffness method:

a$)$ Nodal displacements in global coordinates.

b$)$ Reactions in global coordinates.

c$)$ Axial force in each bar