= Second polar moment of area
{wiki=Second_polar_moment_of_area}
The second polar moment of area, often denoted as \\( J \\), is a measure of an object's resistance to torsional deformation (twisting) when a torque is applied. It is particularly important in the field of mechanical engineering and structural analysis when assessing the performance of structural elements like shafts. The second polar moment of area is defined for a given cross-section and is calculated about an axis perpendicular to the area.
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