## Chapter 9

# Rotational Kinematics, Angular Momentum, and Energy

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Version 3

By Boundless

By Boundless

Boundless Physics

Physics

by Boundless

Section 1

Quantities of Rotational Kinematics

Angular Position, Theta

The angle of rotation is a measurement of the amount (the angle) that a figure is rotated about a fixed point— often the center of a circle.

Angular Velocity, Omega

Angular velocity ω is the rate of change of an angle, mathematically defined as ω =

Angular Acceleration, Alpha

Angular acceleration is the rate of change of angular velocity, expressed mathematically as

Section 5

Rotational Kinetic Energy

Rotational Kinetic Energy: Work, Energy, and Power

The rotational kinetic energy is the kinetic energy due to the rotation of an object and is part of its total kinetic energy.

Moment of Inertia

The moment of inertia is a property of a mass that measures its resistance to rotational acceleration about one or more axes.

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