The only speed the plane has is relative to the belt on the treadmill. It's speed relative to the ground (which is irrelevant) and the air (which is relevant) is zero. It won't generate any lift so can't take off. How is it hard to understand that?
You are kidding, right?
The plane's jet engines push it forward (relative to the air or ground). The fact that the treadmill is going backwards is irrelevant. The only effect of the backward moving treadmill is to make the wheels spin faster.
No, clearly not. The engines generate thrust which the wheels turn into movement against the ground. If it had no wheels to mediate movement it wouldn't move at all (below a certain amount of thrust) due to friction. If the movement of the wheels is nullified by the ground/treadmill countering that thrust then the plane doesn't move, so no uplift.
The plane's jet engines push it forward (relative to the air or ground). The fact that the treadmill is going backwards is irrelevant. The only effect of the backward moving treadmill is to make the wheels spin faster.
No, clearly not. The engines generate thrust which the wheels turn into movement against the ground. If it had no wheels to mediate movement it wouldn't move at all (below a certain amount of thrust) due to friction. If the movement of the wheels is nullified by the ground/treadmill countering that thrust then the plane doesn't move, so no uplift.
But now I think about it again...
"The wheels turn into movement against the ground?!?"
OK, I'm pretty sure you are kidding. But what the heck.
What do you think the purpose of wheels is? Here's a hint - It is to reduce friction between the plane and the surface it is resting on. And, believe it or not, they do a pretty good job.
The treadmill going backwards remains irrelevant - its only impact being to make the wheels spin faster.
The plane's jet engines push it forward (relative to the air or ground). The fact that the treadmill is going backwards is irrelevant. The only effect of the backward moving treadmill is to make the wheels spin faster.
No, clearly not. The engines generate thrust which the wheels turn into movement against the ground. If it had no wheels to mediate movement it wouldn't move at all (below a certain amount of thrust) due to friction. If the movement of the wheels is nullified by the ground/treadmill countering that thrust then the plane doesn't move, so no uplift.
But now I think about it again...
The premise is that the treadmill belt is moving the same speed as the plane, not that the treadmill belt is moving fast enough to keep the plane stationary.
You're saying that the plane won't move, but the premise is that the belt moves the same speed as the plane. So if the plane is stopped, the belt will stop too.