Newton’s First Law states. “The velocity of an object will remain constant unless a net force acts on it.” It is often call the Law of Inertia.
Objects in motion stay in motion. Objects at rest stay at rest.
Unless acted upon by an unbalanced force.
More Mass = More Inertia
The amount of inertia that an object has is dependent on the object’s mass. The more mass an object has the more inertia it has.