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The helicopter view in Fig. shows two people pulling on a stubborn mule. Find (a) the single force that
is equivalent to the two forces shown, and (b) the force that a third person would have to exert on the
mule to make the resultant force equal to zero. The forces are measured in units of newtons
(abbreviated N).

F =
80.0 N
F =
120 N
75.0
60.0

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