Quote:
Originally posted by chumpmann:
If the treadmill moves as fast as the plane it wont take off.

If the plane moves faster than the treadmill and builds up enough speed, yes it will.

Depends on how the question is worded.
So what if the treadmill is moving as fast as the plane? Does the movent of the treadmill restric the flow of air under the wings thus not lifting the plane?

For the plane to take off, there are two forces required: thrust and lift. The speed of runway or whether it's moving forwards or backwards has NO effect on those forces whatsoever.