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42. (a) Applying Eq. 1321 and the Pythagorean theorem leads to
U
=
–
©
¨
§
¹
¸
·
GM
2
2
D
+
2
GmM
y
2
+
D
2
where
M
is the mass of particle
B
(also that of particle
C
) and
m
is the mass of particle
A
.
The value given in the problem statement (for infinitely large
y
, for which the second
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
 Spring '08
 Any
 Physics, Mass

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