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Which means John's point number 4 was incorrect, not number 3. That's what I was missing.

John's point number 3 was also incorrect.


Ok. I'll concede that. So the question becomes what speed is the runway moving for the plane to move at all? Would it not become infinity? At that point, wouln't the wheel bearings be melted or frozen?

No, you were right (if I interprete poorly worded problem correctly). There is no wind, and I assume that the problem author wants us to ignore the draught caused by the belt.

The situation is physically possible only if we assume rolling friction of wheels growing with rotational speed. Then, as I already said, the belt wil 'use' that friction to keep the plane stationary.
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