Conceptual Physics (12th Edition)

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

Chapter 9 - Think and Explain: 51

Answer

Newton's second law explains this. A heavy body doesn’t fall faster than a light body because even though the gravitational force is greater by a factor of X, the force acts on a mass that is larger by the same factor, X. The greater inertia means that the ratio of gravitational force to mass is the same, and so is the acceleration.
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