3.75 ft -17.5 ft 5 ft -6.5 ft W = 1200 lb 10 ft х- F) 3600 lb
For the rig and crate of Prob. 4.43 and assuming that cable is anchored at F as shown, determine (a) the required tension in cable ADCF if the maximum value of the couple at E as x varies from 1.5 to 17.5 ft is to be as small as possible, (b) the corresponding maximum value of the couple.
(Reference to Problem 4.43):
The rig shown consists of a 1200-lb horizontal member ABC and a vertical member DBE welded together at B. The rig is being used to raise a 3600-lb crate at a distance x = 12 ft from the vertical member DBE . If the tension in the cable is 4 kips, determine the reaction at E assuming that the cable is (a) anchored at F as shown in the figure, (b) attached to the vertical member at a point located 1 ft above E.
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