Answered: Suppose, in the event of a pottery…

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 9P

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3. Suppose, in the event of a pottery wheel emergency, the wheel needs
to come to a stop in exactly one revolution from its operational speed of 3.5 rpm. (a) What angular
acceleration is needed? (b) If the rotational inertia of the wheel is 4.5kgm2
, what torque is needed to stop
the wheel?

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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