This text is adapted from Openstax, University Physics Volume 1, Section 5.7 Drawing Free-Body Diagrams. It may be labeled in a different color to indicate that it is separate from the free-body diagram. Note: If there is acceleration, it is not directly included in the free-body diagram however, it may be helpful to indicate acceleration outside the free-body diagram. ![]() Newton's first law is applied if the body is in equilibrium, whereas Newton's second law is applied if the body is accelerating. Once a free-body diagram is drawn, Newton's laws of motion can be applied to solve the problem. Draw a separate free-body diagram for each object in the problem.Resolve all force vectors into x- and y-components.However, do not include the net force on the object, or the forces that the object exerts on its environment. Include all forces that act on the object, representing these forces as vectors.The forces are shown as thin arrows pointing away from the centre of the box or. The object or body is usually shown as a box or a dot. Place this point at the origin of a xy-coordinate system. A free body diagram models the forces acting on an object. If treating the object as a particle, represent the object as a point. ![]() The steps to draw a free-body diagram are listed below: Free-body diagrams are useful in analyzing forces acting on an object or system, and are employed extensively in the study and application of Newton's laws of motion. The first step in describing and analyzing most phenomena in physics involves the careful drawing of a free-body diagram.
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