The helicopter view in the figure shows two people pulling on a stubborn mule. The person on the right pulls with a force F1 of magnitude 81.6 N and direction of θ1 = 65.0°. The person on the left pulls with a force F2 of magnitude 77.0 N and direction of θ2 = 74.0°.
(a) Find the single force that is equivalent to the two forces shown. The forces are measured in units of newtons (symbolized N).
N î + N ĵ
(b) Find the force that a third person would have to exert on the mule to make the resultant force equal to zero.
N î + N ĵ