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the helicopter view in the figure

The helicopter view in the figure below shows two people pulling on a stubborn mule. (Take F, 129 N and F, - 88.0 N.) 75.0 60.0° 60 (a) Find the single force that is equivalent to the two forces shown magnitude direction o counterclockwise from the +x-axis (b) Find the force a third person would have to exert on the mule to make the net force equal to zero. magnitude direction o counterclockwise from the +x-axis Need Hejp? iRead
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Answer #1

Fy = F1 sin 60 + F2 sin 75 = 129 sin 60 + 88 sin 75 = 196.71 N
Fx = F1 cos 60 + F2 cos 75 = 129 cos 60 + 88 cos 75 = 87.27 N
resultant force,
F = \sqrt{} (Fy2 + Fx2) = 215.19 N
direction = tan-1(Fy / Fx) = 66.07

a) 215.19 N & 66.07 counterclockwise from x axis shown

the force to make net force zero is the resultant force acting in opposite direction so

answer to second question is
b) 215.19 N & direction = (180 + 66.07 ) = 246.07 counterclockwise from x axis shown

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