The pdf viewer below contains an Addendum to the text Engineering Statics with MATLAB. Chapter 12 covers forces generated by fluid pressure and the forces in cables. Chapter 13 deals with the virtual work principle for rigid bodies. Chapter 14 discusses both the principle of virtual work for deformable bodies as well as stability. Chapter 15 is a brief introduction to the method of finite elements using either a stiffness-based approach that solves for the displacements as well as a force-based approach that solves for the forces/moments. Appendix C of the Addendum describes a MATLAB function R_loc that locates the resultant of a force system. The pdf viewer can also be used to download the Addendum.