A. Vector analysis B. Force systems (e.g., resultants, concurrent, distributed) C. Force couple systems D. Equilibrium of rigid bodies (e.g., support reactions) E. Internal forces in rigid bodies (e.g., trusses, frames, machines) F. Area properties (e.g., centroids, moments of inertia, radius of gyration, parallel axis theorem) G. Static friction H. Free-body diagrams I. Weight and mass computations (e.g., slug, lbm, lbf, kg, N, ton, dyne, g, gc)