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2. Our notation is as follows:
x
1
= 0 and
y
1
= 0 are the coordinates of the
m
1
= 3.0 kg
particle;
x
2
= 2.0 m and
y
2
= 1.0 m are the coordinates of the
m
2
= 4.0 kg particle; and,
x
3
= 1.0 m and
y
3
= 2.0 m are the coordinates of the
m
3
= 8.0 kg particle.
(a) The
x
coordinate of the center of mass is
()
(
)
(
)
11
2 2
33
com
123
0
4.0 kg 2.0 m
8.0 kg 1.0 m
1.1 m.
3.0 kg 4.0 kg 8.0 kg
mx
x
mmm
++
==
=
+
+
(b) The
y
coordinate of the center of mass is
(
)
(
)
com
0
4.0 kg 1.0 m
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 Spring '08
 Any
 Physics

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