Well you must be intelligent enough to figure out that without intelligence you cannot figure out stuff like that. Why dont you ask a person with zero IQ or downs syndrome if they can answer it. Dude I dont mean to offend you but I didn't post my answer to be a hotshot or get attention or try to sound cool. It sounds like I hurt your feelings by telling you that I got a degree in Mechanical Engineering. The problem in this post is merely a high school physics question so someone like you and me should know more than enough to answer the question. that was simply my point and i was trying to help. People dont submit their replies in posts to get an EGO BOOST. Have a nice day.

 

in a perfect world, i think the people who say the plane will fly are correct. the conveyor is basically adding a retarding force on the forward motion of the plane. Its like trying to take off against more resistance. say... using a plane just lying on its belly. lots of friction, but i suppose it could get going fast enough to take off. however, practically speaking, the engines on a real jet could doubtfully produce enough thrust to counteract the backwards pull of the conveyor AND still get the plane up to speed goin' forward.

i win. h:

 

This goes out to you again Mr. Philosophoer/Mechinical Engineer who cannot solve a high school level physics problem. How in earth is the plane gonna fly if its moving at zero speed relative to the ground. If the conveyor moves back slower than the plane and plane actually moves faster then it is possible that the plane will have a net positive velocity in the horizontal direction and therefore maybe if it gets enough pace it will create enough lift to ply. Dude have you not taken AERODYNAMICS? This is so simple. I notice you have bean arguing about this simple problem all throughout this post and when Im actually trying to give the real and practical answer to the solution you have to post something to criticize me when I am actually about to get a masters degree and I teach this stuff to my students. Dude Im a freakin TA in my Rigid Body Mechanics class. I tell you what you dont have to believe me take this problem to your physics professor who deals with newtonian mechanics and he will tell you. For everyone else who hates arguing and dragging this thread on you can read all the arguements against the plane flying and actually make some sense out of it. and if you guys still dont believe me go to www.howstuffowrks.com and read about how a plane flies and there that shoulod do the trick. I hate it when people try to criticize others that are actually trying to help out just to make themselves feel better. What kind of engineer are you buddy? You need to go read up on physics 1, 2 and take all of your dynamics classes all over again that means, rigid body, dynamics, solid mechanics, aerodynamics. Good luck with that!

 

did you read the entire thread? Read the thread and shut the fuck up.

 

The answer should be put on the original post.

The plane will fly, and it will take off using just as much runway space as it would without the conveyer belt (minus the wheel friction). This is because the turbines thrust the plane foward, not the wheels. It uses the same concept if you think of the plane being hung on a zipline by two cables, one at the front and one at the rear. The plane will still move foward along the zipline because the turbines move the plane, not the wheels. So even though the conveyer belt is "keeping up" with the speed of the wheels turning, it will still move along the conveyer belt and take off.

I know it has been answered already.. but i had to

 

No. Just because it will take off on the belt doesnt mean it will not require a long stretch of runway. And also, planes landing need a long strip too h:

 

I will be greatful once this is locked..

 

seriously why isnt this :closed: yet?

 

Intelligence is still required to understand why the thing will take off. What I said is that a degree has nothing to do with intelligence, so it very unnecessary for you to go off about how now you're going to get your masters and how you teach and all that. It is quite meaningless to me how many degrees you hold and how many people you teach and how much they pay you for it. With all due respect, as you have shown it does not contribute to obtaining the answer. I'm not saying you're not smart, I'm just saying that holding a degree does not automatically make you so.

You think the plane won't take off because you assume it will remain stationary. Wrong assumption. Just because the conveyor is matching the speed of the plane doesn't mean it's keeping it from moving. The plane is freewheeling on the runway, and the conveyor has about as much effect on it as it would on a hovercraft for example...pretty much none.

In fact, according to the riddle the airplane HAS to be moving in order for the conveyor to move the other way.

Anyways, why do people want this thread locked? If it annoys them... perhaps they just shouldn't click on it?

 

haha, yikes! this thread is still going on?

should be :closed: