Question

a picture of an object or a performer showing all of the external forces acting is called
free - body diagram (fbd)
inertial diagram
mass - acceleration diagram (mad)
reaction diagram (rd)
none of the above

Explanation:

A free - body diagram (FBD) is a visual representation that shows all external forces acting on an object or a performer. It is a fundamental tool in physics for analyzing forces and equilibrium. Inertial diagrams, mass - acceleration diagrams, and reaction diagrams are not the standard terms for such a representation.

Answer:

A. free - body diagram (FBD)