i love that one!! lol
Please explain this "joke" to me...
- Thread starter Norbert666
- Start date
i love that one!! lol
So, suppose you're on a game show, and you're given the choice of three doors: Behind one door is a car; behind the others, goats. You pick a door, say No. 1, and the host, who knows what's behind the doors, opens another door, say No. 3, which has a goat. He then says to you, "Do you want to pick door No. 2?" Is it to your advantage to switch your choice?
but you need lift (air going under the wings at speed) to make the plane rise
because the plane is on the treadmill, there is no force what so ever on the wings
1.. so the plane is on the treadmill, at full thrust (and no air is being pushed under the wings)
2.. the pilot now sets the flaps to go from - to the / position, and since there's no air to push against the flaps, it cannot possibly rise into the air
the pilot could do anything with the wings / flaps, and the plane would just carry on at full thrust, not moving at all
-edit, iviv, you should always change door when asked, the host knows where the car is.
because the plane is on the treadmill, there is no force what so ever on the wings
1.. so the plane is on the treadmill, at full thrust (and no air is being pushed under the wings)
2.. the pilot now sets the flaps to go from - to the / position, and since there's no air to push against the flaps, it cannot possibly rise into the air
the pilot could do anything with the wings / flaps, and the plane would just carry on at full thrust, not moving at all
-edit, iviv, you should always change door when asked, the host knows where the car is.
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So, suppose you're on a game show, and you're given the choice of three doors: Behind one door is a car; behind the others, goats. You pick a door, say No. 1, and the host, who knows what's behind the doors, opens another door, say No. 3, which has a goat. He then says to you, "Do you want to pick door No. 2?" Is it to your advantage to switch your choice?
Yes.
Man of Honour
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So, suppose you're on a game show, and you're given the choice of three doors: Behind one door is a car; behind the others, goats. You pick a door, say No. 1, and the host, who knows what's behind the doors, opens another door, say No. 3, which has a goat. He then says to you, "Do you want to pick door No. 2?" Is it to your advantage to switch your choice?
Stop tempting the gullible, you know the answer. It is to your advantage to change, the answer is simple and mathematical.
You've seen the explanation as posted by growse and Anim yet you are still questioning this? The wheels and the treadmill are essentially irrelevant to the question, the plane will move forwards, the wheels will just spin twice as fast in the opposite direction so unless you have something holding the plane in position (a harness for instance) it will move forwards, it will take off and it is as simple as that.
oh ffs, are you serious?
the plane isn't moving, so there's no air lifting the wings, read my post again.
THRUST = the force made by the jet(s)/propeller(s)
LIFT = the force of air passing UNDER the wings which pushes them 'upwards' (and the plane)
you need THRUST and LIFT to take off, unless you're using a jet that points straight down. that would provide both (beacuse of the direction of the thrust)
i didn't say it was!
No, because the conveyor belt/treadmill/whatever doesn't stop the plane from moving. The wheels on the plane provide no power, they are just to allow it to move. If it was done with a car, then it would move nowhere, as the engine directly turns the wheels. But with the plane, the engines push it forwards, but the wheels spin freely. So it doesn't matter what surface the wheels are on, if its moving, etc, the engines will still push the plane forwards, causing the air to move over/under the wings, allowing it to take off.
So, suppose you're on a game show, and you're given the choice of three doors: Behind one door is a car; behind the others, goats. You pick a door, say No. 1, and the host, who knows what's behind the doors, opens another door, say No. 3, which has a goat. He then says to you, "Do you want to pick door No. 2?" Is it to your advantage to switch your choice?
That's from 21
the plane is not moving, correct? yes.
therefore, the plane cannot have any effects of lift, correct? yes!
Bledd, i think youre the only person that doesnt get this now.
Please explain why there is no lift, air is passing over/under the wings just fine because the plane is going forwards just fine, nothing at all is stopping the plane from moving forwards at its factory standard acceleration.
Im just starting to hope youre trolling now.
Please explain why there is no lift, air is passing over/under the wings just fine because the plane is going forwards just fine, nothing at all is stopping the plane from moving forwards at its factory standard acceleration.
^ Wrong
Im just starting to hope youre trolling now.
there is no air going under the wings
not once did i say the wheels provide the power
-edit, hang on, i'm drawing what i'm saying
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Man of Honour
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Why is the plane not moving? Have you harnessed it as I suggest in my post? That is about the only possible reason that it would not move forwards when thrust is applied.
bledd, had the same problems as you getting my head round it, but once you realise the wheels are free spinning neither they nor the treadmill make any difference to the plane taking off.
The engines of the plane are on the wings, not the wheels.
The engines are pushing against the air not the treadmill.
As such as the thrust of the engines increase the forward momentum will quickly overcome the rotational friction of the wheels on the treadmill.
The plane will move forward as normal then take off, but with the wheels spinning faster.
