Conceptual Physics (12th Edition)

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

Chapter 2 - Think and Explain: 47

Answer

Your torso and head's inertia tend to keep them at rest (Newton’s first law.) When your car is struck from behind, the seat pushes your torso forward, but unless you have a headrest that also pushes your head forward, your head won't keep up. Ouch.

Work Step by Step

This is discussed on pages 25-26.
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