Conceptual Physics (12th Edition)

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

Chapter 2 - Think and Explain: 39

Answer

Copernicus could not conceive of a huge sustained force that (he thought) would have to push the Earth to keep it in continuous motion. He did not have the concept of inertia, which explains why the Earth doesn't slow down once it is put into motion.

Work Step by Step

This is discussed on pages 22-25.
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