Quote:
Originally posted by TJ:

So - IF the plane CAN move...it is travelleing DOWN the CONVEYOR BELT
The plane IS NOT traveling down the conveyor belt.

The conveyor belt has matched the speed of the plane. Once this occurs.. the plane is moving ON the conveyor belt. It is not traveling anywhere. Not in relation to the ground.

You are not comprehending the basic statement from the scenario regarding the conveyor matching the plane's speed. Whatever speed the plane happens to decide to operate.