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52. If we wish to use Eq. 35 directly, we should note that the angles for
G
G
G
QR
S
,
and
are
100°, 250° and 310°, respectively, if they are measured counterclockwise from the +
x
axis.
(a) Using unitvector notation, with the unit meter understood, we have
()
ˆˆ
10.0 cos 25.0 i 10.0sin 25.0
j
12.0cos 100 i 12.0sin 100
j
8.00cos 250 i 8.00sin 250
j
9.00cos 310 i 9.00sin 310
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 Spring '08
 Any
 Physics

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