* Remain at rest if it was initially at rest. This is due to Newton's First Law of Motion (the Law of Inertia).
* Continue moving at a constant velocity if it was already in motion. This also follows from Newton's First Law.
In simpler terms:
* If it's not moving, it won't start moving.
* If it's moving, it will keep moving at the same speed and in the same direction.
Let me know if you'd like more explanation on any of these concepts!