Torsion is defined as which of the following?

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Multiple Choice

Torsion is defined as which of the following?

Explanation:
Torsion is twisting of a member caused by a moment that tries to rotate the member about its lengthwise axis. This twisting effect is what distinguishes torsion from forces that pull along the axis (axial) or push perpendicular to the member (which cause bending or transverse shear). An external twisting moment creates shear stresses that act around the cross-section as the member twists, rather than simply compressing/tensioning or bending. That is why the description of torsion as a force resulting from an external moment that rotates the member about its longitudinal axis is the best fit.

Torsion is twisting of a member caused by a moment that tries to rotate the member about its lengthwise axis. This twisting effect is what distinguishes torsion from forces that pull along the axis (axial) or push perpendicular to the member (which cause bending or transverse shear). An external twisting moment creates shear stresses that act around the cross-section as the member twists, rather than simply compressing/tensioning or bending. That is why the description of torsion as a force resulting from an external moment that rotates the member about its longitudinal axis is the best fit.

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