What is free body diagram?

Free Body Diagram is mostly present in engineering and physics. It represents a graphical illustration that visualizes the resulting reactions, applied forces, and moments of the body in the given conditions. They depict bodies that are connected with each other with all the reactions, applied forces and moments that act on the bodies.

A free body diagram is implemented to calculate the resulting reactions in any type of mechanical problem. It is also used to understand the loading of the individual structure of the components, calculation of the internal forces in the structure, and application in the engineering disciplines like structural or biomechanics engineering.