what is inertia in Newtons laws?

Answer 1

Inertia is the tendency of an object to resist any change in its motion. It is described in one of Newton's laws of motion, specifically the first law, also known as the law of inertia. According to this law, an object at rest will remain at rest, and an object in motion will continue moving at a constant velocity in a straight line, unless acted upon by an external force. In other words, inertia is the property of matter that causes objects to resist changes in their state of motion. The greater an object's mass, the greater its inertia, and thus the more force is required to accelerate or decelerate it.