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Which of the following sets of concurrent forces
are in equilibrium?
O a.
F1 = 12, F, = 12, F; = 15
%3D
O b.
F, = 12, F, = 12, F, = 15
F = 9, F2 = 12, F; = 15
Od.
F; = 15, F2 = 12, F3 = 15
O e.
Fy = 9, F2 = 12, F3 = 9

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