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63.
REASONING
According to Newton’s second law, the acceleration has the same
direction as the net force and a magnitude given by
a
=
Σ
F
/
m
.
SOLUTION
Since the two forces are perpendicular, the magnitude of the net
force is given by the Pythagorean theorem as
()
22
40.0 N
60.0 N
F
Σ=
+
. Thus,
according to Newton’s second law, the magnitude of the acceleration is
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 Spring '08
 SOFFER

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