Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

Published by Pearson
ISBN 10: 0133942651
ISBN 13: 978-0-13394-265-1

Chapter 4 - Kinematics in Two Dimensions - Exercises and Problems: 70

Answer

The turbine rotates through 19000 revolutions as it coasts to a stop.

Work Step by Step

The turbine coasts to a stop from 3800 rpm. During this time, the average angular speed is $\frac{3800~rpm+0}{2}$ which is 1900 rpm. We can find the number of revolutions the turbine rotates through as it stops; $\theta = (1900~rpm)(10~min) = 19000~rev$ The turbine rotates through 19000 revolutions as it coasts to a stop.
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