Authors' Homepages:   Anthony Bedford  
Wallace Fowler  
Chapter 19: Energy and Momentum in Rigid-Body Dynamics
"In Chapters 15 and 16 we demonstrated that energy and momentum methods are useful for solving
particular types of problems in dynamics. If the forces on an object are known as functions of position,
the principle of work and energy can be sued to determine the change in the magnitude of the velocity
of the object as it moves between two positions. If the forces are known as function of time, the
principle of impulse and momentum can be used to determine the change in the object's velocity during
an interval of time. We now extend these methods to situations in which both the translational and
rotational motions of objects must be considered."