Question

Polar moment of inertia of thin cylinder

Answer 1

a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.

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Answer 2

Mass is nothing but a resistance to motion similarly mass moment of Inertia is resistance to rotational motion. Area is a resistance to stress developed similarly polar moment of inertia is resistance to torsional stresses developed.