Essential University Physics: Volume 1 (4th Edition)

Published by Pearson
ISBN 10: 0-134-98855-8
ISBN 13: 978-0-13498-855-9

Chapter 8 - For Thought and Discussion - Page 146: 5


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Work Step by Step

The friend should be told that a circular orbit is like a bunch of "miniature falls" for the object in motion. After all, the satellite, like any other object, does fall a bit as it goes forward. However, it also continues to move due to its velocity, so as gravity causes it to fall, its velocity causes it to move away from earth. Thus, it does fall, but this fall is canceled out by the velocity, keeping the satellite in orbit.
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