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1.- The shaft AD shown in the figure will be subjected to the different torques at each pulley. Instead of using solid shafts, it is proposed to use hollow shafts where the diameter of the inner hole is 0.3 in for each section. Given these conditions: 1200 lb in. o lb- in. CD 0.9 dBc 0.75 in. a) Draw the torsion moment diagram for shaft AD. 5 points. dAB 0.6 in b) Find the magnitude and location of the maximum shear stress due to torsion in shaft AD. 10 points.

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