It states that if any object is at motion it tries to be in motion tillany external unbalanced force is applied.And if anu object is at rest it tries to maintain its rest position untill an external unbalanced force is applied.It is also known as law of inertia.
“The body at rest or moving in uniform motion remains at rest or in uniform motion untill on external force try to change or change its positive object or uniform motion”.Newton\’s first law define force.
The object at rest will remain at rest and a object in motion will remain at in uniform motion unless an unbalanced force act on it.
An object at rest will always stay at rest or an object in motion will continue to stay in motion un or unless an external force is applied to it
When the body is rest are continuously in rest and when the body is Motion are continuously in motion