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3. The
x
and the
y
components of a vector
G
a
lying on the
xy
plane are given by
cos ,
sin
xy
aa
θθ
==
where

=
G
is the magnitude and
θ
is the angle between
G
a
and the positive
x
axis.
(a) The
x
component of
G
a
is given by
a
x
= 7.3 cos 250° = – 2.5 m.
(b) and the
y
component is given by
a
y
= 7.3 sin 250° = – 6.9 m.
In considering the variety of ways to compute these, we note that the vector is 70° below
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 Spring '08
 Any
 Physics

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