According to Newton's first law of motion, a force equal to the force keeping the object at rest, but in the opposite direction is what's required to slow an object down.
Newton's First Law of Motion claims: <em>"An object in motion will, in the absence of forces, tend to remain in motion with neither the speed nor direction changing" </em>
<u>Most things on earth tend to actually slow down AND THEN proceed to stop. However; when we consider the situation alone, we can see that there are lots of forces tending to slow the object/s down. Like, friction. Or air resistance. </u>
