Quote:
Originally posted by Hawk:
How about this.....lets see if this can get to the ALR:

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).

Will the plane be able to take off?
Let me try to break what the question is down.

Plane standing on Runway.
Runway matches speed of Plane in opposite direction.

Point of Observer outside the Plane:
Plane appears as usual and takes off.

Point of Onboard Occupants:
Feeling the sensation of acceleration (cool) and the bumpiness of the runway and the separation and weightlessness (very cool) when the plane bobs up and down as it is continually accelerating and climbing until it reaches Cruise Speed and Altitude.

No other fact is included in the question, it is what it is.