Abstract
This chapter explains the meaning of uniform circular motion. An object moving in a circular path with constant speed undergoes uniform circular motion. The time required to complete one revolution is called the period. The chapter also presents centripetal acceleration and its defining equation. It explains the difference between centrifugal and centripetal force. The chapter highlights the definitions of torque and center of mass, and how to use them to solve various types of simple statics problem. Angular momentum is a vector quantity and it obeys a conservation principle. The chapter describes the relationship between angular momentum and torque. The angular momentum of a system remains constant if no torque acts on the system. There are several situations in which angular momentum is important, such as the formation of galaxies and the motion of planets. The chapter additionally reviews the definitions of radius, angular velocity, angular acceleration, rotational inertia, and the role of rotational inertia in rotational motion.
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