23. If we write
G
rxyz
=++
###
i
j
k, then (using Eq. 330) we find
G
G
r
F
×
is equal to
yF
zF
zF
xF
xF
yF
zy
xz
y x
−+
−
di
bg
##
#
ijk
.
(a) Plugging in, we find
()
(
)
ˆˆ
3.0m 6.0N
4.0m
8.0N
k
(50N m) k.
τ
=−
−
=
⋅
ªº
¬¼
G
(b) We use Eq. 327, 

sin ,
G
G
rFr
F
×=
φ
where
is the angle between
G
r
and
G
F
. Now
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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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