The helicopter view in the figure shows two people pulling on a
stubborn mule. The person on the right pulls with a
force 1 of
magnitude 98.9 N and direction
of ????1 = 55.0°. The person on the
left pulls with a force 2 of
magnitude 90.9 N and direction
of ????2 = 63.0°.
(a) Find the single force that is equivalent to the two forces
shown. The forces are measured in units of newtons (symbolized
N).
(b) Find the force that a third person would have to exert on
the mule to make the resultant force equal to zero.