Something amazing to tell you concerning physics and motion

[Frosty]

Then where does the force of the engines go? If they are thrusting at so many pounds against the air, there has to be an equal force against the plane to keep it from not moving. That means you are saying that the treadmill is exerting the same force against the plane as the engines, but since the wheels are spinning, how can that be? They would have to have tremendous friction to match the engines' force.