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36. Using Eq. 2913, the force on, say, wire 1 (the wire at the upper left of the figure) is
along the diagonal (pointing towards wire 3 which is at the lower right). Only the forces
(or their components) along the diagonal direction contribute. With
θ
= 45°, we find the
force per unit meter on wire 1 to be
()
222
000
11
2
1
3
1
4
1
2
1
3
2
2
3


2
cos
2
cos 45
2
22
4
T m A 15.0A
3
1.12
N/m.
8.50 10 m
iii
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 Spring '10
 Bonamente

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