Question

Relation b/w torque and moment of inertia

Answer 1

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When a torque is applied to an object it begins to rotate with an acceleration inversely proportional to its moment of inertia. This relation can be thought of as Newton's Second Law for rotation. The moment of inertia is the rotational mass and the torque is rotational force. Angular motion obeys Newton's First Law.


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Answer 2

Inertia is a force. Inertia is a force which keeps stationary objects at rest and moving objects in motion at constant velocity

An object would not have any inertia in a gravity-free environment (if there is such a place). Inertia is the tendency of all objects to resist motion and ultimately stop.