Physics, Books a la Carte Edition (5th Edition)

5th Edition

ISBN: 9780134020853

Author: James S. Walker

Publisher: PEARSON

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Textbook Question

Chapter 10, Problem 87GP

A person walks into a room and switches on the ceiling fan. The fan accelerates with constant angular acceleration for 15 s until it reaches its operating angular speed of 1.9 rotations/s—after that its speed remains constant as long as the switch is “on.” The person stays in the room for a short time; then, 5.5 minutes after turning the fan on, she switches it off again and leaves the room. The fan now decelerates with constant angular acceleration, taking 24 minutes to come to rest. What is the total number of revolutions made by the fan, from the time it was turned on until the time it stopped?

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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Chapter 10, Problem 86GP

Chapter 10, Problem 88GP

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Chapter 10 Solutions

Physics, Books a la Carte Edition (5th Edition)

Ch. 10.1 - Rank the following systems (A, B, C, D) in order...Ch. 10.2 - An object at rest begins to rotate at t = 0 with...Ch. 10.3 - Disk 1 has a radius r and rotates with an angular...Ch. 10.4 - In a popular pirate movie, two pirates find...Ch. 10.5 - Four masses m are connected by rods of negligible...Ch. 10.6 - A hoop, a disk, a solid sphere, and a hollow...Ch. 10 - A rigid object rotates about a fixed axis. Do all...Ch. 10 - Can you drive your car in such a way that your...Ch. 10 - Can you drive your car in such a way that your...Ch. 10 - The fact that the Earth rotates gives people in...

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