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Problem 2 (20%) A solid steel shaft in a rolling mill transmits 40 kW power at 150 rpm. Determine the smallest safe diameter of

Problem 2 (20%) A solid steel shaft in a rolling mill transmits 40 kW power at 150 rpm. Determine the smallest safe diameter of the shaft if the shear stress is not to exceed 65 MPa. Also find the angle of twist for 4 m long shaft. Use G = 80 GPa.

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