What is interia?

Answer 1

Inertia is a property of matter that describes an object's resistance to changes in its state of motion. An object at rest will remain at rest, and an object in motion will continue to move at a constant velocity in a straight line unless acted upon by a net external force. This concept is a fundamental principle of Newtonian physics and is encapsulated in Newton's first law of motion. Inertia is directly related to mass; the greater the mass of an object, the greater its inertia and its resistance to changes in motion.