According to Newton's First Law of Motion, an object in motion will remain in motion with an unvarying velocity in a straight line unless acted upon by an external force.

This means that an object will continue moving in the same direction and at the same speed unless something changes its motion.

So, as long as there are no external forces acting on the object, it will keep on moving.

Examples:

- A car will continue to roll down the road until it encounters friction from the ground, air resistance, or some other force that slows it down.

- A ball thrown into the air will continue to move upward until it reaches the peak of its trajectory, at which point gravity will cause it to slow down and eventually fall back to the ground.