The uniform 8.05-lb bar AGB is attached to two collars of negligible weight that slide with negligible friction along fixed rods. Its motion is controlled by the force P applied to collar A. Knowing that at the instant shown the speed and acceleration of collar A are 2 ft/s and zero, respectively, determine (a) the applied force P, (b) the force exerted by the fixed rod on the collar at A.
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