(a) Derive the equation of Torsion for circular shaft. (b) A hollow s…

Question

(a) Derive the equation of Torsion for circular shaft.

(b) A hollow steel shaft with a length of 1.8 m is loaded by a torque of 7.5 kNm. Determine the external and internal diameter of the shaft, if the angle of twist is not to exceed 2°, and the shear stress is not to exced 7 kN/cm^2. The modulus of rigidity of steel is 8 MN/cm^2.

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