Plane on a treadmill

[Sinbad]

So now I want to ask you this, what's the point of bringing in a made up treadmill instead of for example a dead dog lying on the runway?

Because the objective is to highlight how people are unable to grasp basic physics, by introducing something that they might think will affect the plane when it actually does not.

A dead dog WOULD exert a force on the plane. The treadmill DOES NOT.

 

[FNfal]

Cars don't have jet engines, the thrust in a car is applied to the wheels, the thrust from a plane is applied to the atmosphere.

low pressure under the wing to give you lift
You need low pressure under the wing to give you lift not thrust on the wings , air moving over the wings to give you lift .

 

[Sinbad]

low pressure under the wing to give you lift
You need low pressure under the wing to give you lift not thrust on the wings , air moving over the wings to give you lift .

Ignore wings, lift, etc. You're confusing yourself (for a start, the low pressure is on top of the wing, not under it). Just explain how the treadmill stops the plane moving forward relative to the air.

 

[Vegeta]

Because the objective is to highlight how people are unable to grasp basic physics, by introducing something that they might think will affect the plane when it actually does not.

A dead dog WOULD exert a force on the plane. The treadmill DOES NOT.

But I didn't think it will keep the plane in place. From the start I said it must NOT keep the plane in place otherwise it wont fly.

 

[Sinbad]

But I didn't think it will keep the plane in place. From the start I said it must NOT keep the plane in place otherwise it wont fly.

So you say the plane will fly?

 

[bwana]

Lmao to fly it needs to leave the treadmill do you agree?

To fly it needs to move forward so the wings can create lift. The spinning prop pulls the plane forward whether it's on the runway, in the air, or on a treadmill.

 

[Vegeta]

So you say the plane will fly?

ONLY if it's allowed to leave the treadmill! Therefor the treadmill never even enters the argument to begin with!

 

[Sinbad]

ONLY if it's allowed to leave the treadmill! Therefor the treadmill never even enters the argument to begin with!

What stops it leaving the treadmill?

 

[FNfal]

Ignore wings, lift, etc. You're confusing yourself (for a start, the low pressure is on top of the wing, not under it). Just explain how the treadmill stops the plane moving forward relative to the air.

It is stationary .

 

[Ho3n3r]

low pressure above the wing to give you lift

FTFY.

 

[Sinbad]

It is stationary .

Explain how the treadmill stops the plane moving.
Make reference to newton's laws, and the principles of friction.

 

[rietrot]

Lmao it's a made-up treadmill! In my world treadmills are powered by an electronic motor. It runs at a certain speed in the opposite direction than the one im facing, for me to stay on the treadmill i need to match that speed going forward. If the plane matches the speed it will stay on the treadmill just like me, if it exceeds the speed it will roll off it to the front, if it moves slower it will roll of to the rear. Just like me.

Now for the plane to fly it needs to leave the treadmill, so why introduce it to the scenario? Unless your imaginary treadmill works differently, if it's the same as mine the result will be the same.

Now i don't know how your imaginary one works you see...

The plane will match the speed of the treadmill then exceed it, accelerate and take off. The weels rotate freely so the treadmill can't brake or stop the plane from accelerating. The weels will just rotate faster as the turbine thrust push against the air.

 

[Sinbad]

The plane will match the speed of the treadmill then exceed it, accelerate and take off. The weels rotate freely so the treadmill can't brake or stop the plane from accelerating. The weels will just rotate faster as the turbine thrust push against the air.

even eks gets it guys

 

[Vegeta]

What stops it leaving the treadmill?

Nothing! Only the imagination of the person that made this nonsense up in the first place

 

[FNfal]

It is stationary .

Obviously if you give any thing enough thrust in the direction you want to take off , say up it would take of .

 

[Sinbad]

Nothing! Only the imagination of the person that made this nonsense up in the first place

No, the person never imagined that.
The point to the whole mental exercise is, can you differentiate between a car, driven by the force of its wheels on the road, and a plane, driven by the force its engines/propellers exert on the AIR AROUND IT

 

[nakedpeanut]

:crylaugh: :crylaugh: :crylaugh:

No wonder people want to burn the universities

 

[Vegeta]

The plane will match the speed of the treadmill then exceed it, accelerate and take off. The weels rotate freely so the treadmill can't brake or stop the plane from accelerating. The weels will just rotate faster as the turbine thrust push against the air.

But no one said this imaginary treadmill has a speed limit it could just increase and match the plane the whole time because it's an imaginary treadmill. People are bringing in a treadmill with a certain speed now because they know they're stupid.

 

[Sinbad]

But no one said this imaginary treadmill has a speed limit it could just increase and match the plane the whole time because it's an imaginary treadmill. People are bringing in a treadmill with a certain speed now because they know they're stupid.

The treadmill can do a million km/h. It won't make a difference.

 

[Ho3n3r]

But no one said this imaginary treadmill has a speed limit it could just increase and match the plane the whole time because it's an imaginary treadmill. People are bringing in a treadmill with a certain speed now because they know they're stupid.

It can be any speed you want it to be, it won't make the plane move any slower, as the force is created via air through the engines, not the wheels. Massive treadmill speed may disintegrate the wheels/their bearings, but it won't make the plane move slower.