Newton's First Law

     Newton's first law states that an object in motion/at rest will stay in motion/at rest unless acted upon by an outside, unbalanced force.  This means that without an outside unbalanced force, moving objects would keep moving.  It would go and go.  So what makes things stop?

     In the video above, a ball is seen rolling toward a wall.  According to Newton's first law, this ball is to stay in motion, unless an outside unbalanced force affects it.  The ball rolls toward the wall, hits it, then keeps rolling.  But at the end of the ball's travels, it stops.  This is not because I manually stopped it with my hand off screen, but simply because an outside unbalanced force.  In this particular scenario, the force is gravity and that is why it stops.