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(c) The angle between the resultant and the +
x
axis is given by
θ
= tan
–1
(
r
y
/
r
x
) = tan
–1
[(10 m)/( –9.0 m)] = – 48° or 132°.
Since the
x
component of the resultant is negative and the
y
component is positive,
characteristic of the second quadrant, we find the angle is 132° (measured
counterclockwise from +
x
axis).
9. We write
G
G
G
r
ab
=+
. When not explicitly displayed, the units here are assumed to be
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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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