42 ABC is an equilateral triangle with O as its centre F F2 and F represent three forces acting along the sides AB BC and AC

Question

42 ABC is an equilateral triangle with O as its centre F F2 and F represent three forces acting along the sides AB BC and AC respectively If the total torque about O is zero then the 70 magnitude of F3 is a F F b F F F F 2 d 2 F F c HAGE 1 8 B TH C R 12 which a that the is equal 4 a 12 c

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