Solution Manual for Mechanics of Materials SI, 9th Edition

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11–1.The shaft is supported by a smooth thrust bearing atBand a journal bearing atC. Determine the resultant internalloadings acting on the cross section atE.Support Reactions:We will only need to computeCyby writing the momentequation of equilibrium aboutBwith reference to the free-body diagram of theentire shaft, Fig.a.aInternal Loadings:Using the result forCy, sectionDEof the shaft will beconsidered. Referring to the free-body diagram, Fig.b,Ans.Ans.aAns.The negative signs indicates thatVEandMEact in the opposite sense to that shownon the free-body diagram.ME= -2400 lb#ft= -2.40 kip#ft1000(4)-800(8)-ME=0+ ©ME=0;VE= -200 lbVE+1000-800=0+ c ©Fy=0;NE=0:+ ©Fx=0;Cy=1000 lbCy(8)+400(4)-800(12)=0+ ©MB=0;AEDBC4 ft400 lb800 lb4 ft4 ft4 ftAns:,,ME= -2.40 kip#ftVE= -200 lbNE=0

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