Example 7-12
• A group of extended bodies, each with a
known CM. Find the CM of the group.
Center of Gravity
• Center of Gravity (CG): Similar to Center of Mass.
CG  That point in extended body at which force of
gravity may be considered to act. For practical
purposes, CG = CM.
Application to The Human Body
Approximate as a collection of particles at various CM points
Example 7-13
Use the Table!! Can have the CM outside of the body!
CM is outside the body!
Conceptual Example 7-14