Authors' Homepages:   Anthony Bedford  
Wallace Fowler  
Chapter 17: Planar Kinematics of Rigid Bodies
"If the external forces acting on an object are known, Newton's second law can be used to determine the
motion of the object's center of mass without considering any angular motion of the object about its
center of mass. In many situation, however, angular motion must also be considered. The rotational
motions of some objects are central to their functions, as in the cases of gears, wheels, generators,
and turbines. In this chapter we analyze motions of objects, including their rotational motions."