Quote:
That is, you're saying that relative to the plane, both the belt and air are stationary. But as viewed from a remote place, they could all be moving 200MPH.
No- viewed from a remote place the belt speed and the wheels are moving 200MPH, but the plane and atmosphere would both appear stationary.

Of course, as previously stated, at 200MPH the plane would not remain stationary relative to the atmosphere because the friction would not prevent the foward movement and the plane would take off. But it is this foward movement that must take place for the take off to happen.
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-Jeff
Rome did not create a great empire by having meetings; they did it by killing all those who opposed them.