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Therefore, the magnitude of
B
d
G
is
22
0


(2
3 / 2)
(3/ 2
3)
(2.0 cm)(4.3)
8.6 cm
B
dl
=+
+
+=
=
G
.
(d) The direction of
B
d
G
is
,
11
1
,
3/2
3
tan
tan
tan (1.13)
48
23
/
2
By
B
Bx
d
d
θ
−−
−
§·
+
==
=
=
°
¨¸
+
©¹
.
27. Let
0
2.0 cm
l
=
be the length of each segment. The nest is located at the endpoint of
segment
w
.
(a) Using unitvector notation, the displacement vector for point A is
() ()
00
0
0
0
ˆˆ
ˆ
ˆ
ˆ
ˆ
(cos60 i sin60 j)
j
(cos120 i sin120 j)
j
ˆ
(2
3) j.
A
dw
v
i
h
l
l
l
l
l
=+++=
°
+
°+
+
°
+
GG
G
Therefore, the magnitude of
A
d
G
is


3)(2.0 cm)
7.5 cm
A
d
=
G
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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

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