Conceptual Physics (12th Edition)

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

Chapter 5 - Think and Explain: 42


The billions of forces within the book, exerted between book molecules, always exist in action-reaction pairs. These forces are internal to the book, and exert no net external force on the book. A net force from the outside would be necessary to accelerate the book.
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