## Skill's weekend teaser

This is a discussion on Skill's weekend teaser within the General Trading Chat forums, part of the To Be Sorted category; Spot on Mr Charts. That what i was trying to say, just not so simply put. Shane Originally Posted by ...

 View Poll Results: What will happen? The plane will take off normally 25 40.32% The plane will remain stationary 32 51.61% The plane will run out of conveyor belt before it can take off 5 8.06% Voters: 62. You may not vote on this poll

Feb 22, 2009, 6:28pm   #201
Senior Member

Member Since Feb 2008
Re: Skill's weekend teaser

Spot on Mr Charts. That what i was trying to say, just not so simply put.
Shane

Quote:
 Originally Posted by Mr. Charts Now look guys, I am extremely ignorant about such things and wouldn't presume to think others are wrong when many are clearly far ahead of me in their understanding. However, the rationale for my answer is as follows - in my own simple (and maybe overly simplistic and therefore distorted) terms: The question postulated, "The belt has the same dimensions as a runway at an airport*, and is set up to exactly match the speed of the plane's wheels, moving in the opposite direction. What will happen? I thought it would remain stationary because for it to take off the wheels would have to move faster than the conveyor belt, thus nullifying the premise of the question that the wheels and the conveyor belt were moving at the same speed in opposite directions. I assume that in the videos the wheels must have been spinning faster than the conveyor belt for the plane to take off. The only time the wheels would have been spinning at the same speed as the belt is when the thrust equalled the small resistance from the friction of the wheel axles. But hey, what did (do) I know about such things. Richard

 Feb 22, 2009, 6:43pm #202 Legendary Member     Member Since Jul 2008 Re: Skill's weekend teaser I answered the same as you Richard! I have accepted that I was wrong but, although it has been explained many times (in detail), I am still slightly baffled Lets say a plane is travelling accross a normal runway at 50mph, now swap that runway for the conveyor belt runway which moves at the same speed in the opposite direction. The plane will be travelling at 50mph in relation to the runway, but what about the ground next to the runway? Say there is a speed camera (one that uses a radar signal not markings on the runway) on the ground next to the conveyor belt runway, and it captures the planes speed. It will be 0mph right? If the runway matches the speed of the plane. So it goes faster, runway goes faster etc etc until it gets to the speed needed to make air. The air will be travelling through the jets at whatever speed. The second the plane leaves the runway, how fast would it be on the radar? Would it just start to accelerate from 0mph? This is why I asked about the rollers, if it was on rollers instead of conveyor runway would this be the same? Oh my, I'm confused Please don't snap at me skill, I don't know why I was created with such a simple mind Sam. __________________ "I have not failed. I've just found 10,000 ways that won't work." Thomas A. Edison
 Feb 22, 2009, 6:50pm #203 Legendary Member     Member Since Jul 2008 Re: Skill's weekend teaser Oh wait, I get it now.... __________________ "I have not failed. I've just found 10,000 ways that won't work." Thomas A. Edison
 Feb 22, 2009, 6:51pm #204 Legendary Member     Member Since Jul 2008 Re: Skill's weekend teaser ...oh no, I don't. __________________ "I have not failed. I've just found 10,000 ways that won't work." Thomas A. Edison