Final answer:
An object rolling across a level floor without any horizontal net force acting on it will keep moving forever.
Step-by-step explanation:
An object rolling across a level floor without any horizontal net force acting on it will keep moving forever.
This is because of Newton's First Law of Motion, also known as the law of inertia. According to this law, an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and direction, unless acted upon by an external force.
In the absence of any horizontal net force, the rolling object will not experience a decelerating force like friction. Therefore, it will continue moving at a constant velocity indefinitely.