Mechanics exams are notoriously tough. Master the core shortcuts to draw free body diagrams and solve truss systems without getting stuck in algebra.
The Secret to Free Body Diagrams (FBD)
Isolate the body completely. Always draw gravitational force acting vertically downward from the center of gravity, and replace all contact surfaces with perpendicular reaction forces.
Truss Analysis shortcuts
Use the **Method of Joints** when you only need forces in a few members, and the **Method of Sections** to cut directly through the target member to solve it in a single equation.