Free-Body Diagram Builder

A Free-Body Diagram shows all external forces on a single object, represented by arrows from the object.

Standard forces: weight (mg, down), normal (N, ⊥ to surface), friction (f, parallel to surface opposing motion), tension (T, along string), applied force.

Choose coordinate axes to simplify — align with incline for ramp problems.

Then apply ΣF = ma along each axis independently.