What forces are included in a free-body diagram for an object?
A)The forces acting on the object and the forces the object exerts on any other objects it is in contact with.
B)The forces acting on the object and the forces the object exerts on all other objects in the system.
C)Only the forces acting on the object.
D)Only forces internal to the object.

Question

​What forces are included in a free-body diagram for an object?
A)​The forces acting on the object and the forces the object exerts on any other objects it is in contact with.
B)​The forces acting on the object and the forces the object exerts on all other objects in the system.
C)​Only the forces acting on the object.
D)​Only forces internal to the object.

Quizplus · Accepted Answer

A free-body diagram is a visual representation of all the external forces acting on an object, therefore only the forces acting on the object need to be included. The forces the object exerts on other objects are not included in a free-body diagram for that specific object. Internal forces within the object are also not included in the diagram unless they influence the motion of the object as a whole.

​What Forces Are Included in a Free-Body Diagram for an Object

What Forces Are Included in a Free-Body Diagram for an Object