Newton's 2nd Law (14 of 21) Free Body Diagrams; An Explanation

Describes what free body diagrams are. How to determine if an object is experiencing balanced or unbalanced forces and what it is doing. Free-body diagrams show the relative magnitude and direction of all forces acting upon an object. A free body diagram is a vector diagram. The relative size of the arrow in a free body diagram shows the magnitude (amount) of the force. The direction of the arrow shows the direction that the force is acting. Each arrow in the diagram should be labeled with the type of force. The object in the free body is often just represented as a square with the force arrows drawn starting from the center of the box moving outward in the direction of the force.
Some of the more common forces and their abbreviations are listed below;
Normal force - Fn
Applied force - Fa
Tension force - Ft
Force of friction - Ff
Force of gravity - Fg
Magnetic force - FB
Electric force - Fel
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