Conceptual Physics (12th Edition)

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

Chapter 22 - Think and Explain: 54

Answer

The thin wires "ground" your car (let any excess charge leak away) when they touch it.

Work Step by Step

That way, if the driver's hand touches the toll collector's hand while money is being exchanged, they won't feel a zap from static electricity.
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