Answer
$U = -1.7\times 10^{-8}~J$
Work Step by Step
We can find the gravitational potential energy:
$U = -\frac{G~M_A~M_B}{R}$
$U = -\frac{(6.67\times 10^{-11}~N~m^2/kg^2)~(20~kg)~(10~kg)}{0.80~m}$
$U = -1.7\times 10^{-8}~J$
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 13 - Gravitation - Problems - Page 381: 38a
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