Key Concept: A free-body diagram is a drawing of a body, or
part of a body
(isolated
from its surroundings), on which
all the external forces and
moments
acting
on the body (or any part) are shown.
In
addition to external forces and moments, all dimensions, angles, and the
coordinate system must be shown to complete the FBD.
Steps: 1.
Define the body or collection of bodies.
2. Define the surroundings
3. Replace the surroundings with their
effects on the body or collection of bodies
4. Construct the Free Body Diagram of the body or
collection of bodies
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