Janson Posted November 19, 2006 Report Share Posted November 19, 2006 imagine this callum:you are wearing roller skates (or lollerskates if you so prefer).you are standing on a treadmill (running machine?)you set it to 5mph, step on, and hold on to the handle thing on the front.you are now standing still, with the wheels of the roller/lollerskates turning quickly due to the treadmill.imagine your arms are fully extended, while holding on to the handle thing.you now fancy a drink, this physics stuff is demanding.you pull on the handle, which moves you forwards on the treadmill, closer to your drink. this moves you forwards relative to the world around you. even if the treadmill sped up, it would not make it any harder for you to pull forwards to your drink.oh and btw, you are the plane, your arms are the engines and the treadmill is the conveyor.made sense?if not, i tried. Quote Link to comment Share on other sites More sharing options...
endofreak Posted November 19, 2006 Report Share Posted November 19, 2006 You just need to think about how a plane propels itself. The engines suck air in the front and force it out the back pushing against the air behind it. The wheels simply reduce friction on the ground. Quote Link to comment Share on other sites More sharing options...
Has anyone seen my shoe? Posted November 19, 2006 Report Share Posted November 19, 2006 Ahh I get you.I still dont think it would though Quote Link to comment Share on other sites More sharing options...
Dan6061 Posted November 19, 2006 Report Share Posted November 19, 2006 No, no, no, no no.NO.The plane isn't in the same position on the conveyor.It's not moving at all, not even turned on, on the conveyor.The conveyor moves it along. Like if your were to stand still on a tread-mill.If the conveyor went fast enough with the plane still on it, the plane will take off? Quote Link to comment Share on other sites More sharing options...
Has anyone seen my shoe? Posted November 19, 2006 Report Share Posted November 19, 2006 Well maybe, if the wheels were locked then it may lift off the ground for split seconds or just take the weight off, it wouldn't fly. Quote Link to comment Share on other sites More sharing options...
omgnoseat Posted November 19, 2006 Report Share Posted November 19, 2006 if the fly would fly on top of the ''stop'' button, and the driver tried to smash it and hit the button, then the fly would have been the cause of the train to stop Quote Link to comment Share on other sites More sharing options...
boon racoon Posted November 19, 2006 Author Report Share Posted November 19, 2006 what about if you push a slinky off the top of an esculator which is going upwards Quote Link to comment Share on other sites More sharing options...
Has anyone seen my shoe? Posted November 19, 2006 Report Share Posted November 19, 2006 Depends on the size of the steps and the slinky.Sometimes with slinkies it gets to the point where the spring doesnt reach over the step then just ends up rolling down. Quote Link to comment Share on other sites More sharing options...
munkee Posted November 19, 2006 Report Share Posted November 19, 2006 what about if you push a slinky off the top of an esculator which is going upwards Stays in the same place but it doesnt have 2 engines attached to it which = thrust Quote Link to comment Share on other sites More sharing options...
Haz Posted November 19, 2006 Report Share Posted November 19, 2006 So long as the rate of fall of the Slinky and the speed of the escalator are equal.(+1)+(-1)=0 Quote Link to comment Share on other sites More sharing options...
Dan6061 Posted November 19, 2006 Report Share Posted November 19, 2006 I saw a video, where this guy manueled down a flat esculator thing that was going upwards.He slowly crept down, then got to a point where he was in the same place, but still manueling.Was so cool! Quote Link to comment Share on other sites More sharing options...
N.Wood Posted November 19, 2006 Report Share Posted November 19, 2006 Can God be omnipitant? Quote Link to comment Share on other sites More sharing options...
boon racoon Posted November 19, 2006 Author Report Share Posted November 19, 2006 I saw a video, where this guy manueled down a flat esculator thing that was going upwards.He slowly crept down, then got to a point where he was in the same place, but still manueling.Was so cool! ryan leech, revolution, circa 2000coolest thing ever done Quote Link to comment Share on other sites More sharing options...
yoyoyo Posted November 19, 2006 Report Share Posted November 19, 2006 Can God be omnipitant?Do you mean omnipotent?All powerful. Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted November 19, 2006 Report Share Posted November 19, 2006 plane does take off, although I don't 100% agree, there is an answer somewhere on the net. BTW you can also read this debate on the wonderful: advanced physics forums Quote Link to comment Share on other sites More sharing options...
Will Arnold Posted November 19, 2006 Report Share Posted November 19, 2006 i reccon the plane takes off for a second or less then falls back down. and repeats!and as for the fly, flies can't travel fast enough surely and anyways if it was going at that speed it wouldnt stop the train it would smash tiny little holes right the way through it and out the other side, much like a bullet! Quote Link to comment Share on other sites More sharing options...
JT! Posted November 19, 2006 Report Share Posted November 19, 2006 The problem with the plane question is that the question is flawed. So there's no point discussing it becuase of that.1+2x3 = 91+2x3 = 7Both correct answers. The plane will not take off, the plane will take off.Both correct answers becuase the question isn't detailed enough.QED. Quote Link to comment Share on other sites More sharing options...
Shaun H Posted November 19, 2006 Report Share Posted November 19, 2006 The problem with the plane question is that the question is flawed. So there's no point discussing it becuase of that.1+2x3 = 91+2x3 = 7Both correct answers. The plane will not take off, the plane will take off.Both correct answers becuase the question isn't detailed enough.QED.Nope incorrect. (with the mathsy bit)BEDMASBracketsExponentsDivision and MultiplicationAddition and SubtractionOnly the bottom ones right (1+2x3=7) because you do the multiplication before the addition. For the top one to be right it would have to be:(1+2)x3=9 Quote Link to comment Share on other sites More sharing options...
Extreme_biker0 Posted November 20, 2006 Report Share Posted November 20, 2006 (edited) Nope incorrect. (with the mathsy bit)BEDMASBracketsExponentsDivision and MultiplicationAddition and SubtractionOnly the bottom ones right (1+2x3=7) because you do the multiplication before the addition. For the top one to be right it would have to be:(1+2)x3=9Whey and curds someone witha brain! Quatro etra NOT demonstrata!God at least in this thread a lot of people were arguing my case witth he plane thing.I can't see why it is so difficult! Would a hovercraft instead of a plane be able to move forward on the conveyor? Yes? Well what if it lowered some little tiny jet engine wheels from the side? What f**kin difference would it make hahaha!? They would just spin!Here's one:When I look into a mirror, in the image i see, my right hand is my left hand and my left hand is my right hand. But my top is still the top of me and the bottom is still the bottom of me. Why am I flipped horizontally but not vertically? Edited November 20, 2006 by Extreme_biker0 Quote Link to comment Share on other sites More sharing options...
Tomm Posted November 20, 2006 Report Share Posted November 20, 2006 Because your mirror is on upside down? My mirror flips both upsidedown and left-to-right, like it should do. Anyone who thinks otherwise is clearly a moron who did dual award science.And the people that think the plane will take off don't need to be so aggressive about it. Especially seeing as we don't even have the exact wording of the problem which is crucial. But then what do I know, I only did dual award science GCSE P.S. This is a whole new can of worms:The Monty Hall ProblemSuppose 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 number 1, and the host, who knows what's behind the doors, opens another door, say number 3, which has a goat. He says to you, "Do you want to pick door number 2?" Is it to your advantage to switch your choice of doors?Don't answer unless you have actually thought hard about this. Even then most people won't get it. But just think of this; if it was a case of simple probability, would I have bothered to post this up?The difference is with this one that there IS a correct answer, which can be proven. Anyway, enjoy. Quote Link to comment Share on other sites More sharing options...
Steve-A Posted November 20, 2006 Report Share Posted November 20, 2006 Before any door is opened theres a 1/3 chance the cars behind either door 1, 2 or 3When door 3 is opened by presenter new chances are 0 chance of car in door 3, 1/2 chance in doors 1 and.Seeing as your choice of door 1 was chosen before the other door was opened, you had a 1/3 chance of the car. You now know theres a 1/2 chance the car is behind door 2. So your better off changing.Though I know that can be countered by saying the probability of door 1 having the car behind it has risen to 1/2 so it doesn't matter if you stick or change as which door the car was behind before door 3 was opened is now irrelevant.The conclusion of which is i dont know. Quote Link to comment Share on other sites More sharing options...
manuel Posted November 20, 2006 Report Share Posted November 20, 2006 When I look into a mirror, in the image i see, my right hand is my left hand and my left hand is my right hand. But my top is still the top of me and the bottom is still the bottom of me. Why am I flipped horizontally but not vertically? Because your eyes are placed horizontally on your body not vertically .....The monty hall one is good ... but i cant see any other answer than no difference to your chances at all It is 50 - 50 all the way.... fact not fiction ....how about the old classic ....place a living cat into a steel chamber, along with a device containing a vial of hydrocyanic acid. There is, in the chamber, a very small amount of a radioactive substance. If even a single atom of the substance decays during the test period, a relay mechanism will trip a hammer, which will, in turn, break the vial and kill the cat. Come back after an hour - is the cat dead or alive ? Quote Link to comment Share on other sites More sharing options...
Brian Bleech Posted November 20, 2006 Report Share Posted November 20, 2006 Because your eyes are placed horizontally on your body not vertically .....The monty hall one is good ... but i cant see any other answer than no difference to your chances at all It is 50 - 50 all the way.... fact not fiction ....how about the old classic ....place a living cat into a steel chamber, along with a device containing a vial of hydrocyanic acid. There is, in the chamber, a very small amount of a radioactive substance. If even a single atom of the substance decays during the test period, a relay mechanism will trip a hammer, which will, in turn, break the vial and kill the cat. Come back after an hour - is the cat dead or alive ?both Quote Link to comment Share on other sites More sharing options...
JT! Posted November 20, 2006 Report Share Posted November 20, 2006 Nope incorrect. (with the mathsy bit)BEDMASBracketsExponentsDivision and MultiplicationAddition and SubtractionOnly the bottom ones right (1+2x3=7) because you do the multiplication before the addition. For the top one to be right it would have to be:(1+2)x3=9Yeah, i knew someone would bring that up, but my points till valid.The Monty Hall ProblemSuppose 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 number 1, and the host, who knows what's behind the doors, opens another door, say number 3, which has a goat. He says to you, "Do you want to pick door number 2?" Is it to your advantage to switch your choice of doors?This is a good one. You have greater chance of winning the car if you change your mind, and go with the other door. It seems like you still have a 50/50 chance. But if you stick with the same door, you still have a 2/3 chance that you have a goat. Quote Link to comment Share on other sites More sharing options...
N.Wood Posted November 20, 2006 Report Share Posted November 20, 2006 place a living cat into a steel chamber, along with a device containing a vial of hydrocyanic acid. There is, in the chamber, a very small amount of a radioactive substance. If even a single atom of the substance decays during the test period, a relay mechanism will trip a hammer, which will, in turn, break the vial and kill the cat. Come back after an hour - is the cat dead or alive ?Depends how long the half life of the parent atom of the radioactive substance is?Or do i have the wrong end of the stick... Quote Link to comment Share on other sites More sharing options...
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