Yet another puzzle for the local Einsteins

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  • just a punk
    So fuckin' bored
    • Jun 2003
    • 32385

    #1

    Yet another puzzle for the local Einsteins

    Can a plane take off form a treadmill that moves back with the same speed as the plane?



    P.S. A very simple physics task but lots of people get tricked with it
    Obey the Cowgod
  • kane
    Too lazy to set a custom title
    • Aug 2001
    • 20684

    #2
    No. The plane is not actually moving forward, therefore, no air gets under the wings to lift it up.

    Comment

    • bns666
      Confirmed Fetishist
      • Mar 2005
      • 11549

      #3
      even if it does take off, it will crash into the front part of the treadmill
      CAM SODASTRIPCHAT
      CHATURBATEX LOVE CAM

      Comment

      • CoolMikey
        Confirmed User
        • Jun 2017
        • 174

        #4
        I think you fucked up the phrasing of the question, plus the setup in that picture is all fucked, the plane needs to be facing the opposite direction. The way a typical treadmill works would cause the plane in that picture to just roll off it towards the back with zero chance of the plane taking off.

        Comment

        • Bladewire
          StraightBro
          • Aug 2003
          • 56220

          #5
          Originally posted by CoolMikey
          I think you fucked up the phrasing of the question, plus the setup in that picture is all fucked, the plane needs to be facing the opposite direction. The way a typical treadmill works would cause the plane in that picture to just roll off it towards the back with zero chance of the plane taking off.
          Excellent observations


          Skype: CallTomNow

          Comment

          • just a punk
            So fuckin' bored
            • Jun 2003
            • 32385

            #6
            Originally posted by CoolMikey
            I think you fucked up the phrasing of the question, plus the setup in that picture is all fucked, the plane needs to be facing the opposite direction. The way a typical treadmill works would cause the plane in that picture to just roll off it towards the back with zero chance of the plane taking off.
            That's just picture and the direction is shown correctly: the plane moves forward and the treadmill moves back with the same speed
            Obey the Cowgod

            Comment

            • CoolMikey
              Confirmed User
              • Jun 2017
              • 174

              #7
              I still don't get it, like kane said the plane wouldn't actually be moving, so why would it take off?

              And like I suggested, the only way to make it take off is make the plane face the opposite direction, and then as treadmill moves it would cause the plane to move backwards, which would make the air move under the wings, and cause it to briefly take off.

              Is this supposed to be tricky? This shit won't even stump grade school kids.

              Comment

              • just a punk
                So fuckin' bored
                • Jun 2003
                • 32385

                #8
                Originally posted by CoolMikey
                Is this supposed to be tricky? This shit won't even stump grade school kids.
                Absolutely no tricks at all. The basic 6th grade school physics is enough
                Obey the Cowgod

                Comment

                • SilentKnight
                  Megan Fox's fluffer
                  • Oct 2005
                  • 24812

                  #9
                  If you're in a falling elevator, can you jump in the air at the same speed you're falling ...and avoid injury?

                  Comment

                  • just a punk
                    So fuckin' bored
                    • Jun 2003
                    • 32385

                    #10
                    Originally posted by SilentKnight
                    If you're in a falling elevator, can you jump in the air at the same speed you're falling ...and avoid injury?
                    This depends. If the elevator is falling with an acceleration of gravity, you won't be able to jump, because you will be in zero a gravity. If it's falling slower than that (because of friction and air resistance), you will be able to jump and compensate the difference between your jump speed and the speed of еру falling elevator. So you can compensate it in case if the elevator has felt form about one meter (you can't jump higher if you are not a trained sportsman). Course in case if the elevator has felt from 10 meters (~ 3 floors), your jump won't help you at all... This is obvious, isn't it?

                    My example is not more difficult. As a hint, I'll remind you yet another task from the school: will the pilot hear the sound of the jet engine behind him, if his plane moves faster than the speed of sound (it's ultrasonic)? Every kid knows the answer, isn't it?
                    Obey the Cowgod

                    Comment

                    • Struggle4Bucks
                      Sieg Hi!
                      • May 2011
                      • 3615

                      #11
                      It's not about the speed in relation to the ground but in relation to the air... Yes the plane would take off...
                      Half troll half amazing!

                      Comment

                      • Struggle4Bucks
                        Sieg Hi!
                        • May 2011
                        • 3615

                        #12
                        Originally posted by SilentKnight
                        If you're in a falling elevator, can you jump in the air at the same speed you're falling ...and avoid injury?
                        No, because you're in a specific inertial system...
                        Half troll half amazing!

                        Comment

                        • MrMaxwell
                          Too lazy to set a custom title
                          • Jul 2005
                          • 10057

                          #13
                          I've had this debate with many idiots
                          I say that the plane would just be all "Āæwhat treadmillĀæ"
                          Why? Because the plane could give a fuck to say what the wheels want
                          The engines generate thrust and that will move the plane forward. Period.
                          Most people seem to imagine this plane having an imaginary chain holding it back
                          Why would the wheels spinning on a treadmill make a fuck
                          Would it not move forward in spite of that?

                          I say OF COURSE IT WOULD

                          Fuck anyone else's answer unless someone makes sense
                          Hash code PAGING ADRACO
                          Adraco would know

                          Comment

                          • just a punk
                            So fuckin' bored
                            • Jun 2003
                            • 32385

                            #14
                            Originally posted by Struggle4Bucks
                            Yes the plane would take off...
                            And... you are totally right

                            Yes, it will take off... in case if its engine will be powerful enough (like almost all the modern aircrafts) to overcome the wheel friction. The plane is not a car and it doesn't use its wheels to move. It uses them only as a fulcrum, but not as a moving force. If the wheels get stuck, the plane will move forward anyways.
                            Obey the Cowgod

                            Comment

                            • MrMaxwell
                              Too lazy to set a custom title
                              • Jul 2005
                              • 10057

                              #15
                              Originally posted by SilentKnight
                              If you're in a falling elevator, can you jump in the air at the same speed you're falling ...and avoid injury?
                              No . For the same reason you get hurt in an automobile crash .
                              I always thought that would work when I was six
                              Until I learned how shit works
                              Now I don't believe this

                              Comment

                              • MrMaxwell
                                Too lazy to set a custom title
                                • Jul 2005
                                • 10057

                                #16
                                Originally posted by CyberSEO
                                And... you are totally right

                                Yes, it will take off... in case if its engine will be powerful enough (like almost all the modern aircrafts) to overcome the wheel friction.
                                What wheel friction? In this scenario there's less friction than they'd even have on the ground for normal takeoff
                                Meanwhile the plane would only be on the belt for a second until it jumped off of there

                                Then I've also heard some fools say
                                Well
                                What if the belt was as long as the whole runway?

                                Plane would still move forward at the same rate of speed and take off, if you ask me.

                                Comment

                                • MrMaxwell
                                  Too lazy to set a custom title
                                  • Jul 2005
                                  • 10057

                                  #17
                                  Well, or in that instance it'd veer off the thing
                                  Who knows

                                  Comment

                                  • just a punk
                                    So fuckin' bored
                                    • Jun 2003
                                    • 32385

                                    #18
                                    Originally posted by MrMaxwell
                                    What wheel friction?
                                    https://en.wikipedia.org/wiki/Rolling_resistance
                                    Obey the Cowgod

                                    Comment

                                    • CaptainHowdy
                                      Too lazy to set a custom title
                                      • Dec 2004
                                      • 94023

                                      #19
                                      I don't want to be an Einstein ...

                                      Comment

                                      • MrMaxwell
                                        Too lazy to set a custom title
                                        • Jul 2005
                                        • 10057

                                        #20
                                        Originally posted by CaptainHowdy
                                        I don't want to be an Einstein ...

                                        You don't want to be an Einstein like a garbage collector doesn't want $68,000,000,000

                                        Comment

                                        • MrMaxwell
                                          Too lazy to set a custom title
                                          • Jul 2005
                                          • 10057

                                          #21
                                          You're saying there would be as much friction with the belt as there would normally be with the ground? Or more? Or what ?

                                          It would not matter

                                          Comment

                                          • CoolMikey
                                            Confirmed User
                                            • Jun 2017
                                            • 174

                                            #22
                                            Originally posted by Struggle4Bucks
                                            It's not about the speed in relation to the ground but in relation to the air... Yes the plane would take off...
                                            1. Imagine you are a person running on a treadmill at 5mph, and treadmill is set to 5mph. Clearly you would be stationary, that's the whole point of a treadmill that you exert energy, while not moving. No?

                                            2. Now, simply replace yourself running, with an airplane. What would cause the airplane to "take off" if it's stationary, like we established in previous step?

                                            Comment

                                            • kane
                                              Too lazy to set a custom title
                                              • Aug 2001
                                              • 20684

                                              #23
                                              I guess this is why I majored in English, not Science lol.

                                              Comment

                                              • MrMaxwell
                                                Too lazy to set a custom title
                                                • Jul 2005
                                                • 10057

                                                #24
                                                If you think of an automobile which relies on what I would refer to as being a friction based propulsion, sure, a conveyor belt turning against the wheels would hold it back

                                                Planes, they use thrust to propel them down the runway and to begin generating some lift
                                                Meanwhile they take to the air and the thrust is then propelling forward the plane which then is in turn creating lift by forcing air over the wings

                                                That's why you stall a plane if you're driving it too slow

                                                See

                                                Comment

                                                • MrMaxwell
                                                  Too lazy to set a custom title
                                                  • Jul 2005
                                                  • 10057

                                                  #25
                                                  Originally posted by CoolMikey
                                                  1. Imagine you are a person running on a treadmill at 5mph, and treadmill is set to 5mph. Clearly you would be stationary, that's the whole point of a treadmill that you exert energy, while not moving. No?

                                                  2. Now, simply replace yourself running, with an airplane. What would cause the airplane to "take off" if it's stationary, like we established in previous step?
                                                  What in all fucking FUCK
                                                  FFS
                                                  What the fuck even the fuck

                                                  Comment

                                                  • just a punk
                                                    So fuckin' bored
                                                    • Jun 2003
                                                    • 32385

                                                    #26
                                                    Originally posted by CoolMikey
                                                    1. Imagine you are a person running on a treadmill at 5mph, and treadmill is set to 5mph. Clearly you would be stationary, that's the whole point of a treadmill that you exert energy, while not moving. No?

                                                    2. Now, simply replace yourself running, with an airplane. What would cause the airplane to "take off" if it's stationary, like we established in previous step?
                                                    You should go to the school, man. The 6th grade class of basic physics is what you really need A plane is not a running human and not a car. It doesn't push itself using ground. It uses air as a point of force application. Just imagine a toy car at a treadmill which is tied by a rope to your hand. You stay in front of that toy car and pull it in your direction. Will it move to you or it will move backwards?

                                                    Hint: that toy car just like any plane doesn't use its wheels to move, so it doesn't care where the ground/treadmill moves to.
                                                    Obey the Cowgod

                                                    Comment

                                                    • Struggle4Bucks
                                                      Sieg Hi!
                                                      • May 2011
                                                      • 3615

                                                      #27
                                                      Originally posted by CoolMikey
                                                      1. Imagine you are a person running on a treadmill at 5mph, and treadmill is set to 5mph. Clearly you would be stationary, that's the whole point of a treadmill that you exert energy, while not moving. No?

                                                      2. Now, simply replace yourself running, with an airplane. What would cause the airplane to "take off" if it's stationary, like we established in previous step?
                                                      1.The whole point of a treadmill is losing calories... not exerting energy...
                                                      2.An airplane is called an airplane not a groundplane or a wheelplane... An airplane coudn't care less about it's "stationary" speed compared to the ground...
                                                      Half troll half amazing!

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                                                      • MrMaxwell
                                                        Too lazy to set a custom title
                                                        • Jul 2005
                                                        • 10057

                                                        #28

                                                        Comment

                                                        • Struggle4Bucks
                                                          Sieg Hi!
                                                          • May 2011
                                                          • 3615

                                                          #29
                                                          When you are in a windtunnel... you can "fly" while staying "stationary" compared to the ground...
                                                          Half troll half amazing!

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                                                          • MrMaxwell
                                                            Too lazy to set a custom title
                                                            • Jul 2005
                                                            • 10057

                                                            #30
                                                            Originally posted by Struggle4Bucks
                                                            When you are in a windtunnel... you can "fly" while staying "stationary" compared to the ground...
                                                            I have tried to convince people on this one before
                                                            Don't let it drive you crazy

                                                            Comment

                                                            • CoolMikey
                                                              Confirmed User
                                                              • Jun 2017
                                                              • 174

                                                              #31
                                                              Originally posted by Struggle4Bucks
                                                              When you are in a windtunnel... you can "fly" while staying "stationary" compared to the ground...
                                                              In a windtunnel the air moves, in this scenario with the information given there is no reason to believe that the air is moving.

                                                              Comment

                                                              • Struggle4Bucks
                                                                Sieg Hi!
                                                                • May 2011
                                                                • 3615

                                                                #32
                                                                Originally posted by CoolMikey
                                                                In a windtunnel the air moves, in this scenario with the information given there is no reason to believe that the air is moving.
                                                                What do engines do?
                                                                Half troll half amazing!

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                                                                • just a punk
                                                                  So fuckin' bored
                                                                  • Jun 2003
                                                                  • 32385

                                                                  #33
                                                                  BTW, what about my similar question: will a pilot hear a sound of the jet engine behind him, if his plane moves faster than the speed of sound (it's ultrasonic)? ;)
                                                                  Obey the Cowgod

                                                                  Comment

                                                                  • CoolMikey
                                                                    Confirmed User
                                                                    • Jun 2017
                                                                    • 174

                                                                    #34
                                                                    Originally posted by Struggle4Bucks
                                                                    What do engines do?
                                                                    What engines? Please point out where "engines" are mentioned in this scenario. All was said that the airplane "moves". For all we know the airplane is getting towed by trucks, or was just launched from a giant slingshot. I have no idea why you guys are assuming that "engines" are involved here. All that is known that the airplane "moves", there is no reason to make any assumption about what is causing the "movement" of the airplane.

                                                                    Comment

                                                                    • Struggle4Bucks
                                                                      Sieg Hi!
                                                                      • May 2011
                                                                      • 3615

                                                                      #35
                                                                      Originally posted by CyberSEO
                                                                      BTW, what about my similar question: will a pilot hear a sound of the jet engine behind him, if his plane moves faster than the speed of sound (it's ultrasonic)? ;)
                                                                      Not so greedy... this puzzle first:

                                                                      http://gfy.com/fucking-around-and-pr...in-puzzle.html
                                                                      Half troll half amazing!

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                                                                      • mineistaken
                                                                        See signature :)
                                                                        • Apr 2007
                                                                        • 29656

                                                                        #36
                                                                        Originally posted by CyberSEO
                                                                        This depends. If the elevator is falling with an acceleration of gravity, you won't be able to jump, because you will be in zero a gravity. If it's falling slower than that (because of friction and air resistance), you will be able to jump and compensate the difference between your jump speed and the speed of еру falling elevator. So you can compensate it in case if the elevator has felt form about one meter (you can't jump higher if you are not a trained sportsman). Course in case if the elevator has felt from 10 meters (~ 3 floors), your jump won't help you at all... This is obvious, isn't it?
                                                                        So is it depending on free fall with gravity vs fall with friction or is it depending on from how high it falls?
                                                                        Two different things you posted.

                                                                        Comment

                                                                        • Struggle4Bucks
                                                                          Sieg Hi!
                                                                          • May 2011
                                                                          • 3615

                                                                          #37
                                                                          Originally posted by mineistaken
                                                                          So is it depending on free fall with gravity vs fall woth friction or is it depending on from how high it falls?
                                                                          Two different things you posted.
                                                                          and then there is the "trained sportman factor"... He will break his neck against the elevator ceiling because he jumped too high....
                                                                          Half troll half amazing!

                                                                          Comment

                                                                          • pimpmaster9000
                                                                            Too lazy to set a custom title
                                                                            • Dec 2011
                                                                            • 26730

                                                                            #38
                                                                            It's amazing how some people here finished elementary school...
                                                                            Report a suspicious cracker: Click Here

                                                                            Comment

                                                                            • MrMaxwell
                                                                              Too lazy to set a custom title
                                                                              • Jul 2005
                                                                              • 10057

                                                                              #39
                                                                              Originally posted by crucifissio
                                                                              It's amazing how some people here finished elementary school...
                                                                              I left school when I'm twelve years old, myself

                                                                              Comment

                                                                              • CurrentlySober
                                                                                Too lazy to wipe my ass
                                                                                • Aug 2002
                                                                                • 38944

                                                                                #40
                                                                                how the fuck should i know? i cunt a4d a plane or a treadmill to find out...


                                                                                👁️ 👍️ 💩

                                                                                Comment

                                                                                • CurrentlySober
                                                                                  Too lazy to wipe my ass
                                                                                  • Aug 2002
                                                                                  • 38944

                                                                                  #41
                                                                                  Originally posted by crucifissio
                                                                                  It's amazing how some people here finished elementary school...
                                                                                  All it proves is how irrelevant stuff like this that is taught in schools is, when it comes to actual practical applications of adult life


                                                                                  👁️ 👍️ 💩

                                                                                  Comment

                                                                                  • just a punk
                                                                                    So fuckin' bored
                                                                                    • Jun 2003
                                                                                    • 32385

                                                                                    #42
                                                                                    Originally posted by mineistaken
                                                                                    So is it depending on free fall with gravity vs fall with friction or is it depending on from how high it falls?
                                                                                    Two different things you posted.
                                                                                    You have asked about a falling lift. That can be a real life one (which has friction and air resistance) and a theoretical one which falls down in vacuum w/o rails etc. Yes, these are two VERY different cases
                                                                                    Obey the Cowgod

                                                                                    Comment

                                                                                    • mineistaken
                                                                                      See signature :)
                                                                                      • Apr 2007
                                                                                      • 29656

                                                                                      #43
                                                                                      Originally posted by CyberSEO
                                                                                      You have asked about a falling lift. That can be a real life one (which has friction and air resistance) and a theoretical one which falls down in vacuum w/o rails etc. Yes, these are two VERY different cases
                                                                                      First of all it was not me who asked.

                                                                                      Secondly, not those different things I was talking about.

                                                                                      You mentioned that it depend of whether it is frictioned (then you can jump) vs non frictioned (you can't).

                                                                                      Then you proceeded that it depends on height (this is the DIFFERENT thing from friction/non friction I was referring to).

                                                                                      So now I ask, does it depend on friction/non friction or on low height vs high height? << these are the 2 different things I was referring to.

                                                                                      Comment

                                                                                      • TheDynasty
                                                                                        See Signature
                                                                                        • Apr 2016
                                                                                        • 5882

                                                                                        #44
                                                                                        puzzzles puzzles for all
                                                                                        Try out WP-SCRIPT The Best Tube Script

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                                                                                        • blackmonsters
                                                                                          Making PHP work
                                                                                          • Nov 2002
                                                                                          • 20992

                                                                                          #45
                                                                                          Originally posted by SilentKnight
                                                                                          If you're in a falling elevator, can you jump in the air at the same speed you're falling ...and avoid injury?
                                                                                          Test the theory by jumping out of a moving car.


                                                                                          Your neighbor will murder you with frogs
                                                                                          Click here

                                                                                          Comment

                                                                                          • EddyTheDog
                                                                                            Just Doing My Own Thing
                                                                                            • Jan 2011
                                                                                            • 25433

                                                                                            #46
                                                                                            No it wont take off...

                                                                                            If you thought it would - FAIL.....

                                                                                            Sorry...

                                                                                            Comment

                                                                                            • MrMaxwell
                                                                                              Too lazy to set a custom title
                                                                                              • Jul 2005
                                                                                              • 10057

                                                                                              #47
                                                                                              Originally posted by EddyTheDog
                                                                                              No it wont take off...

                                                                                              If you thought it would - FAIL.....

                                                                                              Sorry...
                                                                                              I respectfully decline being in agreeance on this one

                                                                                              Comment

                                                                                              • EddyTheDog
                                                                                                Just Doing My Own Thing
                                                                                                • Jan 2011
                                                                                                • 25433

                                                                                                #48
                                                                                                Originally posted by MrMaxwell
                                                                                                I respectfully decline being in agreeance on this one
                                                                                                Nothing is providing lift - What part of the plane on the treadmill is giving it any lift?..

                                                                                                The engines are making it go faster - It's still stationary on the treadmill - No LIFT!....

                                                                                                No lift no fly...

                                                                                                Comment

                                                                                                • NatalieK
                                                                                                  Natalie K
                                                                                                  • Apr 2010
                                                                                                  • 19825

                                                                                                  #49
                                                                                                  as long as the wind under the wings is a greater force than above, the plane can lift. Therefore, a 200mph wind would lift a plan off the ground even if it was stationary. If the plane is stationary and there“s no air flow created by the engines driving the plane forward it will not be able to fly.

                                                                                                  Given this, as the jet engine pushes into the air, no matter what the ground, or runway, or treadmill is doing, the engines will be pushing the plane through the air anyway, so will take off, if the runway was long enough. The engines and wings would still need the same distance to take off!

                                                                                                  The wheels can spin back or forward and are of no relevance to the plane, wing and engines.
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                                                                                                  • MrMaxwell
                                                                                                    Too lazy to set a custom title
                                                                                                    • Jul 2005
                                                                                                    • 10057

                                                                                                    #50
                                                                                                    I think that the plane would move forward as much or more than it normally would, personally
                                                                                                    I didn't know that airplane wings could generate lift without forward movement
                                                                                                    I guess pushing the air over the wings could generate lift but I think the air is pushed out behind the wings
                                                                                                    Talking out of my ass as I am no expert though

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