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You terrible fail at Physics ... The speed of the plane relativelly to the treadmill is DOUBLE the pulling speed.
some people here funnily mix up the speed the wheels turn and the actual speed of the plane.
The problem states the tredmill moves as fast as the plane, not the wheels.
Basically the wheels would have to run with the doubled speed compared to a "normal" lift off.
Oh, and the plane would take off
no you are wrong, the plane and the treadmill and my hand are moveing in the same speed, just in aother directions thats it . you guy need to go to school again. seriously!!
lol, i want to see how you count that in a formular why the plane wont take off.
it will take off, just the weels spin twice as fast.
In the original image (assuming is correct):
- the relative speed of the plane to observer (air) is 0. => the thrust made by the plane engine is just enought to compensate the wheel friction. there is no other indication of how big the thrust is.
You get the point
fakt is the plane will move forwart, and when it does it will get ascending force to lift up
(imagine that the treadmill is long enough, so the plane can accelerate till it has the ascending force to lift up)
No, the problem prohibits any forward movement of the plane (the problem is wrong, and seems to be based an a false idea that a plane drives the same way a car does, but that is not the point), so the plane cannot be allowed to move forward according to the problem.
If we stay within the confines of the problem, ergo, we play along and pretend a plane's forward momentum can be counteracted by a treadmill, it cannot take off.
If we are allowed to disregard the rules put forth by the problem such as you do, then i can construct it to proove anything i want, hence we need to stay within the confines of the problem, even if the problem is based on a faulty assumption.
No, the problem prohibits any forward movement of the plane (the problem is wrong, and seems to be based an a false idea that a plane drives the same way a car does, but that is not the point), so the plane cannot be allowed to move forward according to the problem.
What the hell dude. They take off into the wind because it's easier that way.Wrong, this is why at airports they have wind-socks that tell them what direction the wind is blowing. Airplanes take off into the wind.
http://www.bobjellison.com/Vigilante_photos/A5.jpegWhat I mean is, if a 25,000 pound thrust jet is running full throttle, you are gointg to have a micro climate around the plane were air is being ****ed into the engine and out the back at such a high speed, winds are created.
Exactly. See? It has nothing to do with "wind over wings"The JSF can take off without lift with thrust vectoring.
Right. Then how does an airplane take off when there is no wind?The air chucked out of the back of the engines does not pass over and under the wings therefore it provides no lift.
show me the line where the problem states that the plane wont move forward?
You get that impression from a gif that has nothing (NOTHING) to do with the actual problem.
The plane will move forward!