An aluminum bar of circular cross-section and the profile specified in Prob. C2.1 is subjected to a 15-N · m torque. Use numerical integration to compute the angle of twist of the bar. For aluminum, use G = 30 GPa. Using Simpson`s rule.   Please explain thank you

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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.