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Fri 5th Oct 2007 1:58am
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Quoted........
'A plane is standing on a runway that can move (some sort of treadmill). The plane moves in one direction, while the conveyor moves at the same speed but in the opposite direction.
Can the plane take off?'
Can the plane take off?'
You wouldn't believe how many people get this wrong :|
Edited by spunge [BANNED] on 05/10/07 2:22pm
Fri 5th Oct 2007 2:03am
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no because its just the wheels running and theres no air gliding over the wings which is what gives the plane lift....
Fri 5th Oct 2007 2:04am
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That's one person to get it wrong 
GdN
EctoFri 5th Oct 2007 3:10am
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it says the plane is standing, so surely the plan just gets pushed to the end? Your statment says the plane moves, not the plane is moving.
milkehFri 5th Oct 2007 3:46am
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i think your looking to deep into it ecto lol, it probably takes off fine the fact the plane isnt going forward shouldnt matter should it? i mean dont they only use runways to reach the necesary speed for take off? and if its on a treadmill going at the same speed as the treadmill in the opposite direction. it should have nearly no effect, thats my muddled logic
StarkeyFri 5th Oct 2007 9:13am
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Dunno about a play, but a plane might be able too 
Fri 5th Oct 2007 9:44am
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There was a massive thread about this on another forum I read about a year ago, went on for so long. The riddle is a bit screwed though.
So I know the answer, but I'll leave you guessing :P
So I know the answer, but I'll leave you guessing :P
robbsFri 5th Oct 2007 9:56am
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the plane takes off with the runway then crashes and burns on an island and thus creates lost....
inspired [BANNED]Fri 5th Oct 2007 10:05am
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bit of a far fetched conclusion robbs
milkehs got it
milkehs got it
dolphinianFri 5th Oct 2007 11:02am
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surely if the conveyor is moving at the same speed in the opposite direction it actually causes the wheels to go faster, which would end up resulting in the plane moving at the same speed? or at least faster than the conveyors speed
assuming ofcourse the conveyor is working as a treadmill like you describe, to cause the plane to slow down it would have to be going the same way, or the opposite way to a standard treadmill at least...
assuming ofcourse the conveyor is working as a treadmill like you describe, to cause the plane to slow down it would have to be going the same way, or the opposite way to a standard treadmill at least...
Fri 5th Oct 2007 11:11am
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Mileh sounds right. As long as it's going the necessary speed to take off then it doesn't matter if it's moving forwards as it will still get the required wind lift to take off?
Fri 5th Oct 2007 11:21am
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To me, it sounds like there's some trickery in the question.
First off, it is stated that the plane is stationary. But then it goes on to say that the plane moves in one direction and the moveable runway moves in the opposite direction. Say, from this statement that the plane is therefore moving forwards and the conveyor is moving towards the back of the plane. This can happen if the plane has an impetus in the forward direction and at a velocity greater than the moving escalator. The plane can easily take off as it is moving forwards.
Planes can only get airbourne by air running over the contours of the plane's wings, creating 'lift'. - My two cents.
First off, it is stated that the plane is stationary. But then it goes on to say that the plane moves in one direction and the moveable runway moves in the opposite direction. Say, from this statement that the plane is therefore moving forwards and the conveyor is moving towards the back of the plane. This can happen if the plane has an impetus in the forward direction and at a velocity greater than the moving escalator. The plane can easily take off as it is moving forwards.
Planes can only get airbourne by air running over the contours of the plane's wings, creating 'lift'. - My two cents.
Rewind` [BANNED]Fri 5th Oct 2007 11:26am
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How big is the plane ?
is there a pilot ?
What type of treadmill can u get to support this plane ?
baring in mind you need Acceleration , Lift from the Flaps =] , Human Pressence
if the 3 above are met then it might take off :S
is there a pilot ?
What type of treadmill can u get to support this plane ?
baring in mind you need Acceleration , Lift from the Flaps =] , Human Pressence
if the 3 above are met then it might take off :S
Fri 5th Oct 2007 12:01pm
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rewind, he's not being literal, stop taking it so seriously lawl. but yeah, i think the plane would take off
Fri 5th Oct 2007 12:06pm
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wtf rewind you just asked the shittest questions ever, are you actually deficient
Fri 5th Oct 2007 12:16pm
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According to Professor Rewind's law Acceleration multiplied by Lift from the Flaps divided by Human Presence = A plane might take off
Fri 5th Oct 2007 12:32pm
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Quoted........
What type of treadmill can u get to support this plane ?
rofl...
Heres your answer:
http://www.straightdope.com/columns/060303.html
Fri 5th Oct 2007 12:40pm
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so i would actually be correct then 
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