Conceptual Physics (12th Edition)

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

Chapter 10 - Think and Explain: 82


The Earth's acceleration toward the sun is maximum when the net force is maximum, by Newton's second law. The gravitational force is maximum at the perigee, when Earth is closest to the sun. By the same reasoning, at the apogee, the Earth's acceleration is at its minimum.
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