http://www.ck12.org Chapter 9. Rotational Motion
CHAPTER
(^9) Rotational Motion
Chapter Outline
9.1 Kinematics of Rotation
9.2 Moment of Inertia
9.3 Torque
9.4 NEWTON’SSECONDLAW FORROTATION
9.5 YO-YOTYPEPROBLEMS
9.6 ROLLINGOBJECTS
9.7 ROLLINGENERGYPROBLEMS
9.8 ANGULARMOMENTUM
Introduction
The Big Idea
The third conservation law isconservation of angular momentum.This vector quantity is the product of rotational
velocity and rotational inertia. In any closed system (including the universe) the quantity of angular momentum is
fixed. Angular momentum can be transferred from one body to another, but cannot be lost or gained. If a system
has its angular momentum changed from the outside it is caused by a torque. Torque is a force applied at a distance
from the center of rotation.