P22_045.PDF
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Chapter 22 - 22.45
45. The magnitude of the net force on the
q
=42
×
10
−
6
Cchargeis
k
0
.
28
2
+
k
|
q
1
q
q
0
.
44
2
q
2
|
where
q
1
=30
×
10
−
9
Cand
|
q
2
|
=40
×
10
−
9
C. This yields 0
.
22 N. Using Newton’s second law, we
obtain
m
=
F
0
.
22N
a
=
10
3
m
/
s
2
=2
.
2
×
10
−
6
kg
.
100
×
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