Question

ABC is an equilateral triangle with O as its centre.
Fi, F, and F, represent three forces acting along
the sides AB, BC and AC respectively. If the total
torque about O is zero then the magnitude of F, is
(AIPMT Pre. 2012)
(2) 2(F, + F2)
(3) F,+F2
(4) F,-F2
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Answer 1

here is ur answer ...

Answer 2

T=o

Tf1+Tf2-Tf3=0

F1+F2-F3=0

F3=F1+F2