Many everyday objects undergo motion in a circle including: a spinning compact disk, the wheels (and other components) of a car, and a ceiling fan to name just a few. While motion in a circle occurs i...Many everyday objects undergo motion in a circle including: a spinning compact disk, the wheels (and other components) of a car, and a ceiling fan to name just a few. While motion in a circle occurs in two dimensions, it turns out that this motion has a lot in common with motion on a line. We will analyze this motion using all of the techniques we have developed in one-dimensional and two-dimensional motion.