[QUOTE=ISAtlanta300]
Quote Originally Posted by speedminded

Hmmm so by your definition if someone were to press the EMERGENCY STOP on the treadmill, the plane would suddenly be going 20 MPH now on the stopped treadmill even if his speed was set and untouched, at 10mph ??

I smell a new sport... conveyor-belt drag racing !! Go 100mph, press stop, then fly by at 200mph instantaneously !!!
The speed of the plane would NOT change -- you can stop it instantly or you can speed it up to 100 mph, the speed the plane progresses forward will never change...it will only effect the speed of the wheels.