Question

what is inertia in laws of motion?

Answer 1

Newton first law of motion states that
an object at motion with the same speed and direction unless unbalance force act upon it
this tendency to resist changes in their state of motion described as motion

Answer 2

Inertia is the tendency of an object to remain at rest or in motion. Newton's First Law of Motion states that an object will remain at rest or move at a constant speed in a straight line unless it is acted on by an unbalanced force.