6-4. Draw the shear and moment diagrams for the cantilever beam.
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6-3. The engine crane is used to support the engine, which has a weight of 1200 lb. Draw the shear and moment diagrams of the boom ABC when it is in the horizontal position shown.
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6-2. Draw the shear and moment diagrams for the simply supported beam.
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6-1. Draw the shear and moment diagrams for the shaft. The bearings at A and B exert only vertical reactions on the shaft.
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5-35. The 25-mm-diameter shaft on the motor is made of a material having an allowable shear stress of 75 MPa. If the motor is operating at its maximum power of 5 kW, determine the minimum allowable rotation of the shaft.
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5-34. The gear motor can develop 3 hp when it turns at 150 rev/min. If the allowable shear stress for the shaft is 12 ksi, determine the smallest diameter of the shaft to the nearest 1/8 inch that can be used.
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•5-33. The gear motor can develop 2 hp when it turns at 450 rev/min. If the shaft has a diameter of 1 in., determine the maximum shear stress developed in the shaft.
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5-32. The pump operates using the motor that has a power of 85 W. If the impeller at B is turning at 150 rev/min, determine the maximum shear stress developed in the 20-mm-diameter transmission shaft at A.
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5-31. The solid steel shaft AC has a diameter of 25 mm and is supported by smooth bearings at D and E. It is coupled to a motor at C, which delivers 3 kW of power to the shaft while it is turning at 50 rev/s. If gears A and B remove 1 kW and 2 k W, respectively, determine the maximum shear stress developed in the shaft within regions AB and BC. The shaft is free to turn in its support bearings D and E.
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5-30. The shaft is subjected to a distributed torque along its length of t =(10x^2) N • m/m, where x is in meters. If the maximum stress in the shaft is to remain constant at 80 MPa, determine the required variation of the radius c of the shaft for 0< x <3 m.
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