Question: Two control rods are attached at A to lever AB. Using trigonometry and knowing that the force in the right-hand rod is F2 = 20

Two control rods are attached at A to lever AB. Using trigonometry and knowing that the force in the right-hand rod is F2 = 20 lb, determine

(a) The required force F1 in the left-hand rod if the resultant R of the forces exerted by the rods on the lever is to be vertical,

(b) The corresponding magnitude of R.



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