PHYS 1500 Lecture Notes - Lecture 12: Orbital Period, Semi-Major And Semi-Minor Axes, Net Force
Document Summary
In linear motion, displacement, velocity, and acceleration are important concepts. Each of these have an analog in rotational motion. The angle theta subtended by an arc length s along a circle of radius, measured in radians counterclockwise from the positive x axis is =s/r. Rigid body each part of the body is fixed in position relative to all other parts of the body. When a rigid body rotates through a given angle, all parts of the body rotate through the same angle at the same time. The reference line will move during time t, through angle theta. The angle theta measured in radians is the angular position. Angular displacement the angle the object rotates through during some time interval. Each point on the object will undergo the same angular displacement. The average angular speed of a rotating rigid object is the ration of the angular displacement to the time interval: average= / t.
