Conceptual Physics (12th Edition)

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

Chapter 5 - Think and Explain: 72


The action force is Earth pulling downward on the ball. The reaction force is the ball pulling upward on the Earth. The ball's acceleration all along the path, including at the top, is $10 \frac{m}{s^{2}}$, directed downward. It is in free fall.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.