An object at rest stays at rest an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
An object at rest remains at rest and an object in action stays in action unless force acts upon it.
EXPLANATION:
Inertia is the property of matter that leads to opposing any change in motion. This suggests, the heavier the object, the higher the force it will take to relocate it. Thus, inertia is linked to mass. An object at rest stays at rest an object in motion stays in motion by the same speed and in the same direction except acted upon by an unstable force.
