M
1
R
2m
3m
2d
d
A
B
m
C
m
D
M
d
2d
M
2
Astronomy 103 Class Exercise: Newton’s Law of Gravity
Part 1:
Newton’s Universal Law of Gravity describes the attractive force F
between point masses M
1
and M
2
separated by distance R.
Note that due to
Newton’s 3
rd
Law, both masses experience this force (in different directions).
What would the value of the gravitational force be in terms of F if:
a)
the mass of M
1
was doubled?
b)
the mass of M
2
was halved?
c)
the mass of M
1
was halved and the mass of M
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 Fall '10
 Dr.MelissaBrucker
 Astronomy, Mass, General Relativity, Gravitational constant, Universal Law of Gravity

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