# Rotational Dynamics

## Introduction and Summary

Summary Introduction and Summary

Having developed the kinematics of rotational motion, we now turn to the dynamics of rotational motion. Unlike the linear case, however, we do not have Newton's Laws to guide us in our study. Instead, we try to develop parallel concepts to those of linear dynamics. Still, the study of rotational dynamics contains unique concepts and equations.

Just as force played a huge role in linear dynamics, we have a torque in rotational dynamics. We begin by defining this quantity and showing how it acts on objects in rotational motion. Next, we relate torque to our study of kinematics through an equation very similar to Newton's Second Law. In addition, we develop concepts of work, kinetic energy, and power similar to those seen in linear motion, and develop equations to describe the combined motion of linear and angular motion.

This SparkNote holds perhaps the most information on rotational motion. We develop a multitude of equations to describe the motion, relate force, torque, and kinematic quantities, and even study the complexities of combined motion. From this chapter one can gain a full understanding of the causes and effects of rotational motion.