Answered: a tire is rotating with an angular…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter10: Rotational Motion

Section: Chapter Questions

Problem 4P

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Question

If a tire is rotating with an angular velocity that is into the page, then the angular acceleration is (answer choice 1) if the tire is slowing down and the angular acceleration is (answer choice 2) if the tire is speeding up.

Answer choices:

clockwise, counterclockwise, or 0 rad/s/s

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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