A rectangular signboard weighing 600N is suspended from a point P by two light cables PA and PB that lie in the same vertical plane. Cable PA is inclined at 30∘ to the horizontal, while cable PB is inclined at 60∘ to the horizontal on the opposite side of P.
(a) Draw the free-body diagram of the signboard.
(b) Calculate the tensions in the two cables that keep the signboard at rest.