Newton 1st law of motion and innertia relation

 Newtons first law of motion

If external force is excerted upon an object then static object will remain static and dynamic object will remain dynamic.

Let an object is static,

If no force excert on it no work will happen. Object will not change its location. Object will not get any motion.

On the other hand without force dynamic object will remain dynamic. 

Friction is a force that restrict the motion of object by opposite direction and make it static.

If we look at the definition of innertia. We find that innertia is a property of object to remaining its existing state, dynamic or static. Dynamic object tends to dynamic and static object tends to static.