Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 5 - Circular Motion; Gravitation - Problems - Page 135: 64

Answer

0.378

Work Step by Step

The speed for an object orbiting a distance $r$ around a mass $M$ is given by $v=\sqrt{\frac{GM}{r}}$ as found in Example 5-12. $$\frac{v_A}{v_B}=\frac{\sqrt{\frac{GM_{star}}{r_A}}}{\sqrt{\frac{GM_{star}}{r_B}}}=\sqrt{\frac{r_B}{r_A}}=\sqrt{\frac{1}{7.0}}=0.378$$
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