What the heck is inertia

The answer is A- a resistance of any physical object to any change in its state of motion.

Explanation- Inertia means the resistance an object has to a change in its state of motion. Newton's conception of inertia stood in direct opposition to more popular conceptions about motion. The dominant thought prior to Newton's day was that it was the natural tendency of objects to come to a rest position.

A) acceleration. this seems to be the one that makes sense.

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