PHYS 211 Lecture Notes - Lecture 15: Rotational Energy, Angular Acceleration, Angular Velocity
Document Summary
Phys 211- lecture 15 -rotational kinematics and moment of inertia. To illustrate motion relative to the center of mass, we can examine the rotation of an object about an axis that goes through the object"s center of mass. To describe rotational motion, we apply the same concepts from 1d kinematics when an object is moving with a constant acceleration. Although these are very similar to the kinematics equations, it is important to remember that , , are in terms of radians and that rotation in the counterclockwise direction is considered to be in the positive direction. The sum within the parenthesis is equal to a new concept that is inherent to rotational motion, the moment of inertia (i). We see that that the equation for rotational kinetic energy is very similar to the kinetic energy equation seen previously (1. 2 m v2) and that the moment of inertia plays a similar role to the role of an object"s mass.
