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# PHYSICS 1500 Stack 2

### Chapter 2

Translational motion Horizontal or vertical movement
Rotational motion Circular movement
Rotational inertia Body rotating tends to stay rotating
Angular position Orientation of a rotating object relative to reference orientation
Angular velocity Angular position changes over time in a given direction
Angular speed Angular position changes over time
Axis of rotation The area in which an object is rotating in
The right hand rule Rule designating rotation to the right, thumb points in position of the axis, fingers curl in the direction of rotation.
Newton's First Law of Rotational Motion A rigid object that is not wobbling and not subject to outside torques rotates at constant angular velocity
Torque Outside influence that causes rotation
Center of mass The point of an object where mass is equally distributed
Angular acceleration Degrees/sec^2, measures how quickly angular velocity changes
Newton-meter measurement of torque, N*m
Net torque All torques being exerted on a rotating object
Newton's second law of rotational motion Net torque=rotational mass x angular acceleration
Newton's third law of rotational motion For every torque exerted, there is an equal and opposite torque
Center of gravity center of mass
Friction Opposition of two forces that are in direct contact of each other due to surface contact
Relative motion When two surfaces are traveling at different velocities
Momentum Measure of object's translational motion = mass * velocity
Impulse Force exerted on an object for a certain amount of time, used to transfer momentum
Angular momentum Measure of object's rotational momentum = rotational mass * angular velocity
kg X m^2/s S.I. unit for angular momentum
Angular impulse Transfer of angular momentum
Created by: rebelpride