A 21-in.-long uniform rod AB weighs 6.4 lb and is attached to a ball-and socket joint at
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A 21-in.-long uniform rod AB weighs 6.4 lb and is attached to a ball-and socket joint at A. The rod rests against an inclined frictionless surface and is held in the position shown by cord BC. Knowing that the cord is 21in. long, determine
(a) The tension in the cord,
(b) The reactions at A and B.
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