Question

what is the relation of mass of an object with its inertia

Answer 1

Mass is directly proptinol to inertia

Answer 2

The tendency of an object to resist changes in its state of motion varies with mass. Mass is that quantity that is solely dependent upon the inertia of an object. The more inertia that an object has, the more mass that it has. A more massive object has a greater tendency to resist changes in its state of motion.