Answered: A disk spins counter-clockwise at 25.6…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter12: Rotation I: Kinematics And Dynamics

Section: Chapter Questions

Problem 35PQ: In testing an automobile tire for proper alignment, a technicianmarks a spot on the tire 0.200 m...

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A disk spins counter-clockwise at 25.6 rad/s. Due to friction, it slows down at a constant rate. After having made 12 turns on itself, it only turns at 5.1 rad/s.

find;
c) angular acceleration (pay attention to sign conventions!):
d) The number of additional revolutions the disc will make before stopping:

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

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