Sections: 4.3 Principle of Superposition + 4.4 Statically Indeterminate Axially Loaded Members + 4.5 The Force Method of Analysis
Practice Problems: 4-32, 4-49, 4-55, 4-58
Textbook: Mechanics of Materials by R. C. Hibbeler - 10th Ed. (Global Edition)
Lecture notes are available here: https://sites.google.com/view/alahijazi/classes/mechanics-of-materials