Conceptual Physics (12th Edition)

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

Chapter 9 - Think and Solve - Page 178: 39

Answer

$$G \frac{m_{1} m_{2}}{d^{2}} = 9 \times G \frac{m_{1} m_{2}}{(3 d)^{2}} $$ Your weight at the surface is 9 times your weight at the top of the (unreasonably tall) ladder.
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