the following solid shaft has a diameter of 20 mm, determine the following:   a-    a -  The polar moment of inertia for the shaft.         b- The absolute maximum shear stress developed in the shaft. b-              c-  The angle of twist of the end B. Take G= 75 GPa.

Q: 300 N ·m 1 m 1000 N · m D 1.5 m 1 m

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Q: shear

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Torsion

In mechanical engineering, torque, torsion, and twisting moment are three of the most important concepts which have different meanings. Torque is the consequence of a moment of a force that produces an angular acceleration in a body or induces rotational kinetic energy in a body. For instance, in an automobile, the power transmission shaft is a body that is always under rotation due to the external torque acting on it, this torque is created by the engine.