Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 8 - Reading Check Questions (Comprehension): 4

Answer

When rolling, a train's wheels have the same rotational speed (RPM). However, the wider part of the wheel, with its greater radius, has a greater tangential speed when the wheel rolls. This is important when the train rounds a curve and the outer wheels need to travel a greater distance than the inner wheels.

Work Step by Step

This is explained with text and diagrams on page 135.
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