Answer:
Inertia is the resistance to a change in motion.
Therefore, an object at rest remains at rest and an object in motion remains in motion with the same velocity unless acted upon by an unbalanced/external force.
Inertia is a tendency to do nothing or to remain unchanged.
It is 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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