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?
NEED EXPLANATION. IF YOU HAVE NO IDEA THEN YOU CAN'T EXPLAIN IT EVEN IF YOU FIND AN ANSWER. HELP ME 4CHAN
Name:
Anonymous2006-11-18 17:44
we just did this thread like a week ago.
Name:
Anonymous2006-11-20 19:38
>>1
No, stupid, the plane doesn't move so it can't get over the air. Only wheels move.
Bet 1 and the OP of the thread last week are in the same class and can't come up with an answer to the retard question.
Airplane wings generate lift through the difference in the air pressure created by the wing's shape and the movement of air around the wing.
Since the treadmill is keeping pace with the wheel's movements, the wings receive no incoming air. No moving air = no lift, no lift = no flight.
If you're taking a class and got this question, the teacher obviously covered it. Pay some fucking attention in class and stop daydreaming about the porn you got off of 4chan.
I suppose I'd ask that you not copy/paste my explination and turn it in for yourself, but somehow I don't think you'd listen anyway.
Name:
Anonymous2006-11-21 0:10
The plane flies. Airplanes aren't like cars, they don't use their wheels to accelerate them to takeoff speed, their engines do that. The friction between the ground and the airplane is negligible, since you have wheels, so the airplane WILL accelerate to a speed high enough for takeoff.
I've never seen 4chan fail so bad.
Name:
Anonymous2006-11-21 11:45
depends on the friction in the wheel bearings, the length of the runway, etc
wow, this thread fails. lift is a function of the plane's velocity relative to the air. disreguarding the small amount of wind made by the conveyor belt moving, the plane has no relative velocity with relation to the wind and thus generates no lift, meaning it cannot fly.
Name:
Anonymous2006-11-21 15:21
>>9
The wheels spin twice as fast since planes move on the runway by pushing off against air, not against the ground.
All the conveyor belt is going to do is make the wheels of the plane's landing gear turn backwards. The plane will move backwards slightly due to friction from the wheels, but not much.
The wheels aren't what accelerates the plane; the engines are. The key point of the entire problem is that the plane moves because the engines are accelerating the plane, not the wheels turning on the tarmac.
The wheels will turn twice as fast as normal during take off, the plane will go its normal speed, and the plane WILL take off.