This document discusses free body diagrams and how to create them. It defines a free body diagram as a diagram that shows all the forces acting on an object. It then provides steps for creating free body diagrams, including isolating the object, choosing a coordinate system, sketching the forces, resolving forces into components, finding the net force, and applying Newton's Second Law of Motion. Examples are given of drawing a free body diagram for a book on a table and a car accelerating on a road.