Re: think about this...
Equal and opposite reactions, the pressure on the board and the pressure on the fan are equal, in an ideal situation, so no motion.
If the planes wheels can't slip and the conveyor structure is motionless, with respect to the plane and air flow then there is no lift.
If a truck driver has a load of chickens at a weigh station and beats on all the cages so the chickens are flying at the moment he is weighed, does the truck weigh less?
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