if you,re running inside a gymnasium you will feel the air hit your face eventhough you are inside. if you are running on a treadmill you will not feel it. if you can one day, put your treadmil outside on a day when it's not windy, plug it with a cord extension and run on it. you will not feel wind. if you get off the treadmill and run, you will feel wind.no shyt sherlock, you ever seen a plane take on the inside of an airport?
Think of it this way. If you get on a treadmill with rollerblades on and hold on to the rails, wouldn't you be able to pull yourself forward regardless of the speed of the treadmill? Your acceleration doesn't come from the wheels of the rollerblades, but from your arms. It's the same for the plane, it doesn't matter how fast its wheels are spinning relevant to the treadmill. Once its engines are propelling it forward, it will take off.
Plenty of people tried to explain it to you. Don't know how else to break it down. it's up to you from now...