A disturbing number of people, probably products of public education, believe that a plane on a treadmill won't be able to take off.
The fact that this debate still goes on just proves that our schools are a continual failure.
Uh-oh, I'll take a chance on putting my foot in it here... Won't be the first time.
How can a plane on a treadmill take off? There's no air rushing by the wings to provide lift.
If you put a car on a treadmill, set the treadmill to 20mph, and the car to 20mph, the car will remain stationary. This is because the car imparts force through the tires, against the ground. So, for the car to say 20mph, the wheels have to be spinning at 20mph, and since the ground is moving at 20mph, then the net movement is 0.
A plane, however, doesn't impart force through the tires. It imparts force on the air, so it's not connected in any way to the treadmill, except through free-spinning wheels. So the plane will move forward, at 20mph relative to the air, where the car will hold still, at 20mph relative to the treadmill.
Because the air is independent of the treadmill so as far as the air is "concerned" the plane is moving just the same as if it was not on a treadmill at all so the air will still rush under the wings.
Frankly however it's a slightly tricky one and even some physics professors replied incorrectly because the answer seems so instinctively correct so it's nothing to be foot in mouth about. It's one of those things people tell each other (and themselves) so they can convince themselves that they are smarter than others, makes them feel quite superior
Eh, there's no problem with people giving the wrong answer. The problem is the people who refuse to listen to the explanation.
Usually though, it has to do with the wording of the question. If you say 'the treadmill matches the speed of the wheel', then that's not really possible, because the speed of the wheel will always be the speed of the plane + the speed of the treadmill. That just reinforces the idea that the plane is holding still.
Oh that isn't a problem with our education system that is a problem with human nature, we can't accept that we are wrong and we quickly consider ourselves part of a "team" in a debate and are loath to switch sides.
It's largely a problem of education... we don't teach critical thinking, we don't teach problem solving, we don't teach logic.
We teach tests. That's it.
More like they teach how to cheat on tests. http://usnews.nbcnews.com/_news/2012/11 … tests?lite Authorities say the scheme affected hundreds — if not thousands — of public school students who ended up being taught by unqualified instructors. http://www.ajc.com/news/news/more-cheat … t-e/nSPqj/
I decided to work through an extreme example...
An infinite treadmill.
Going in reverse at 300 miles an hour (or at whatever speed one wishes). And carrying the plane along with it.
Plane starts engines; initiates full thrust...
Since, as you stated, the plane is independent of the surface it is on; the effects of that thrust will be cumulative until airborne and air resistance starts setting in.
The treadmill is a constant.
Cumulative wins over constant every time.
You are right.
I leaned something today.
by Georgiakevin7 years ago
When "No Child Will Be Left behind " began I was invited to several meetings. The main speakers said that education should be like private industry. It was also said that Japan & Germany were leaving us...
by dragonrider326 years ago
1. There is no way on earth that all the kids in public schools now could be placed in private schools/homes. There are no where near enough places for them. If you don't provide for all of them...what are you setting...
by David Stillwell5 years ago
This has always been a controversial subject, but what is the role of Christ in the public education system? Does learning religious type material make a difference in children and their actions? Should...
by Arthur Fontes6 years ago
Thousands rally at Illinois Capitol — for a tax raiseThousands of teachers and other union workers descended on the state Capitol on Wednesday and chanted "raise my taxes" to try to pressure politicians to...
by earnestshub7 years ago
How can a logical human arrive at the conclusion that out of the thousands of different bible beliefs, only their's is right.Is that not a description of Megalomania?
by wordpro7 years ago
What do you think the biggest problem with our current education system (k-12) is? Why does it seem like the US is so "dumb" compared to other countries? What are we doing wrong?
Copyright © 2017 HubPages Inc. and respective owners.
Other product and company names shown may be trademarks of their respective owners.
HubPages® is a registered Service Mark of HubPages, Inc.
HubPages and Hubbers (authors) may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others.