Problem 1-26/ Engineering Mechanics Materials.

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Engineering Mechanics Problem Solving.
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The shaft is supported at its ends by two bearings A
and B and is subjected to the forces applied to the pulleys fixed to the shaft. Determine the resultant internal loadings
acting on the cross section located at point C. The 300-N forces act in the -z direction and the 500-N forces act in the +x direction. The journal bearings at A and B exert only
x and z components of force on the shaft.
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How did you get 0.45 for the section moment

adewaleabdulsalam
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A transmission shaft is supported on two bearings which are 1m apart. Power is supplied to the shaft by means of a flexible coupling, which is located to the left of left hand bearing. Power is transmitted from the shaft by means of a belt pulley, 250 mm diameter, which is located at a distance of 300 mm from the left hand bearing. The mass of the pulley is 20 kg and the ratio of belt tension on tight and slack sides is 2:1. The belt tensions act vertically downward. The shaft is made of steel with yield stress 300N/mm2 and the factor of safety is 3. Determine the shaft diameter, if it transmits 10 kW power at 360 rpm from the coupling to the pulley.

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