I flatter myself that I have done more than "read up" on velocity, I have a degree in physics. Pressure has nothing to do with it.
Pressure has everything to do with it. You can't have velocity without having pressure.
You don't understand the simple concept that velocity can only ever be measured relative to another non accelerating observer.
I'm talking about being inside a bus or a plane, not being in your apsce looking in or outside of your plane/bus looking into it. Understand this before you start tripping up over your own shoe laces.
Acceleration on the other hand is an absolute measurement. In other words, it doesn't depend on the motion of the observer.
Same thing, it's still pressure, only this pressure is never constant, as long as acceleration is evident.
This is why when you are in a train moving at a constant speed you feel stationary.
You may feel stationary inside of it but you are still under pressure, which is what we are dealing with.
However, if the train speeds up or slows down you can feel it.
Yes you can feel it because the train becomes more pressurised due to more acceleration and that pressurisation will only become constant, once the train stops accelerating.
An airport on Earth is almost in a non accelerating reference frame, it is accelerating slightly due to the Earth's slow rotation.
It's not accelerating at all. It's as still as the ground you walk on now, as long as their are no bombs going off in your vicinity or Earthquakes, etc. Nothing is rotating like you believe.
When a plane takes off it is moving away from the airport. Just as if you were on a train and took a walk you would be moving away from your seat.
It's moving away from your sight. That's not what we are dealing with. You've took this road for whatever reason. Maybe because you don't understand reality.
In the reference frame of the train you would measure the speed you were walking at relative to your seat, or the whole train. You wouldn't measure how fast you are walking relative to the Earth. It wouldn't matter if you walk up or down the train.
If the train is in constant motion then your body goes with that in that pressure.
If you don't understand this, you pretend not to or you make a childish remark feel free to stick your head up your ass. I suspect it may already be there.
I understand perfectly what I'm talking about. It's you that is twisting things to suit whatever needs you want it to suit, which has nothing to do with what I'm trying to educate you with.
Calm down and stop appearing vulnerable.