Quote:
Originally posted by MattyX:
The plane will travel forward relative to the ground, relative to the air, and at twice that rate relative to the conveyor.
No it won't.

The WHEELS will travel at twice the rate relative to the conveyor.

The conveyor matches the PLANE'S speed.

Jet says it's doing 60knots.

Conveyor is going -60 knots.

Wheels are going 120 knots relative to the conveyor.

The original question:

Quote:
A plane is standing on a runway that can move (like a giant conveyor
belt). This conveyor has a control system that tracks the plane's
speed and tunes the speed of the conveyor to be exactly the same (but
in the opposite direction).
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"Nature has constituted utility to man the standard and test of virtue. Men living in different countries, under different circumstances, different habits and regimens, may have different utilities; the same act, therefore, may be useful and consequently virtuous in one country which is injurious and vicious in another differently circumstanced" - Thomas Jefferson, moral relativist