PHYS 115 Chapter Notes - Chapter 7: Pythagorean Theorem, Acceleration, Speed
Document Summary
Each has its analog in rotational motion: angular displacement, angular velocity, and angular acceleration. Angular quantities must me expressed in radians. Angular displacement: the difference between its final and initial angles. Angular position: the angle measured in radians. Each point on the disc undergoes the same angular displacement in any given time interval. The average angular speed of a rotating rigid object during the time interval is the angular displacement divided by change in time. The instantaneous angular speed of a rotating rigid object is the limit of the average speed as the time interval approaches zero. An objects average angular acceleration during the time interval is the change in its angular speed divided by change in time. Positive angular accelerations are counter clockwise; negative angular accelerations are clockwise. The instantaneous angular acceleration is the limit of the average angular acceleration as the time interval approaches zero.
