Here's why:
* Newton's First Law of Motion (Inertia): An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by a net force. This means that no force is required to keep an object moving at a constant velocity.
* Friction: In the real world, we often observe objects slowing down and eventually stopping. This is because of forces like friction that oppose motion.
So, what keeps an object moving?
* No force is needed to keep an object moving at a constant velocity. This is simply the natural state of objects.
* Forces are required to change the motion of an object, whether that's starting it from rest, stopping it, changing its speed, or changing its direction.
Example:
Imagine a hockey puck sliding across the ice. Once it's been given a push, it will continue to move in a straight line at a constant speed until something stops it (like friction from the ice or a collision with the boards).
In summary: The concept of a "force maintaining motion" is incorrect. Motion itself doesn't require a force to be maintained, it's the change in motion that requires a force.
