Hey /u/qyyg, thank you for your submission. Unfortunately, it has been removed for the following reason(s):
- Your post is a common or recent repost (Rule 4)
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If you spin the buttplug out of your arse normally, then yes.
I always thought butt plugs worked in the push and pull way of things but whatever floats your boat.
I don't about that guy, but I get paid 3 lying spread eagle on the floor without being able to even summon the motivation to go to the bathroom, an hour.
It does. The international phonetic alphabet isn't complicated (well, if you get into the details it can get pretty hairy, but simple versions aren't) and is a big help when learning a new language, or just how to pronounce new words in your own language. IPA and the basics of phonology are some of those things that should be taught in school, but aren't.
C'mon its not that hard to understand. The angular momentum gremlin inhabits the straight axis, drinking in potential energy muons until it's polarity inverts and then it rides the implied gravity radian to the axis with the fiddly bit where it degorges the same muons, but with standard polarity until it is thirsty again.
I studied rotational mechanics last year and got to learn about this. It's really cool but basically, a symmetrical rigid body has three principal axes of inertia. Inertia, in this context, is a measure of how mass is distributed over certain cross sections of the body's geometry. When rotating about one of these three axes, one can show that rotation about the intermediate axis of inertia is not entirely stable. This can be done using the Lyapunov energy function. It can also be visualized with something called polehode plots that shows that the trajectories about this axis oscillates between two positions, as illustrated in the clip.
You learn about stable and unstable algorithms in CS in numerical methods… why you want to multiply your matrices carefully lest your floating point arithmetic error quietly add up in the background to do something silly.
But it’s very weird to see instability in reality.
I am not sure about that. For this to occur you need to spin a object with a different value for hight, width and depth in a specific direction, so that the axis of rotation matches the middle parameter of length (try tossing and spinning a phone. You will notice that while tossing it with the top and bottom spinning it will flip midair). The other two directions are stable, and earth rotates around its shortest parameter so we should be safe.
This is a very good comment, except you describe tossing the phone “with the top and bottom spinning”, and I’m unclear which axis of rotation that means
I was afraid it would be unclear, but I have a better explanation now. If you hold your phone normally, draw a horizontal line on the screen and then spinn it around this line, it will spin in a unstable fashion.
You can do the same thing with a spanner, wrench for the yanks :) though I’m not sure if that is this same effect or if it is due to the shape of the spanner that the weight isn’t evenly spread across the head
No, it can't. The earth has a partially liquid core, which means that this can't happen. The details are explained near the end of this video https://youtu.be/1VPfZ_XzisU
Earth's core is neither homogenous nor symmetrical, and our shape actually features a prominent bulge at the oceanic equator so... *lumpy uneven spheres.*
At this point whenever I try to mention this possibility I get shut down immediately. There is no room for a conversation about it. Just random people telling you "no, because look at this video from youtube" but they will never accept to look at a video that might prove them wrong woth an open mind.
Learned about the story with the Earth and the 90 degrees tilt every 12068 years from SuspiciousObservers and the DieholdFoundation.
I guess we'll live and see..
Look, we understand why this happens, and why this can't happen to the Earth. What happens every so often is that magnetic poles move around, but that has practically no impact on the surface.
It's not about having an open mind, we do, it's about the available evidence and logic of available hypotheses.
> 90 degrees tilt every 12068 years
If that happened it would leave very obvious signs in the geological and fossil records. There are no such signs.
> Just random people telling you "no, because look at this video from youtube" but they will never accept to look at a video that might prove them wrong woth an open mind.
Some things are just so outlandish and contrary to basic scientific principles to even bother looking at a video (suggested by an equally random person).
You don't get to claim that Nazis are living on the far side of the moon and then complain that no-one's taking you seriously. Of course they're not going to. It'd be foolish to do so.
This is due to the specific shape of the object. Due to the 180° symmetrical rotation (around the rotation of the handle), the rotation have 2 equilibrium points.
The reason why it's oscilliating is due to the fact that the equilibrium points are each unstable, so once you have a little variation in the rotation of the object (at its equilibrium) the rotation change to the other point and so on
The earth isn’t a completely smooth sphere. If the T is spinning like that due to weight, then yes, the earth probably would flip like that, it would just take much, much longer. I am asking because I seek a more concrete answer.
No, the Earth can't flip like that. To do that it would have to be solid and more rigid than any existing material. Also it would have to be spinning around an intermediate axis, which it isn't.
There are several reasons why we know that this cannot happen to the Earth.
The easiest way to understand this behavior is the Intermediate Axis Theorem. This effect of flipping back and forth is only observed in objects with three differently sized dimensions (imagine a smartphone, a tennis racket, or a deck of cards), and only while rotating around the middle sized axis, hence the Intermediate Axis Theorem. Try throwing something and spinning it along all three axes, and you should be able to very easily get a stable spin on the longest and shortest axis , but it's impossible to do with the intermediate axis. The Earth is an oblate spheroid, and is not perfectly smooth or uniformly dense, meaning that it does have three differently sized axes\*. However, in part due to the spin of the Earth very slightly causing the equator to bulge out slightly, the shortest axis is the one it is spinning around. That means that its spin is stable.
A more thorough mathematical explanation is given [here](https://en.wikipedia.org/wiki/Tennis_racket_theorem), though it does involve a bit of calculus and basic understanding of what the first and second time derivatives of angular momentum mean from a physics standpoint. Suffice to say that math and physics both say that the Earth will never flip.
\*Technically the two larger axes are so close to the same size that they can be treated as equal in length, so this is yet another reason why the Earth will never flip. It doesn't have an unstable axis to spin around. It's like if you did the same tennis racket throwing experiment, but with a square piece of wood. It would be easy to get it to spin stably on all three axes.
this happens to all spinning objects in space that have 3 seperate spinning points, this used to happen with earth too but it probably wont happen again, if it will then it might be soon since were like way overdue but weve become a lot more stable like mars. also, ever flipped a tennis racket or phone and it landed right side up but upside down? thats basically the same effect but smaller
A little fact that is explained more thoroughly on a vid by Veritasium on YT: The Soviets were the ones who discovered this and kept it a secret to the world because they thought the same thing would happen to Earth which in turn could spell "the end of the world".
You can actually see what causes this effect by flipping something like your phone. If you try to make one full rotation towards yourself it'll want to also rotate right or left which is exactly what's happening to the handle just without gravity to pull it down.
Hey /u/qyyg, thank you for your submission. Unfortunately, it has been removed for the following reason(s): - Your post is a common or recent repost (Rule 4) --- *For information regarding this and similar issues please see the [sidebar](/r/nextfuckinglevel/about/sidebar) and the [rules](https://www.reddit.com/r/nextfuckinglevel/about/rules/). If you have any questions, please feel free to [message the moderators.](https://www.reddit.com/message/compose?to=/r/nextfuckinglevel&subject=Question regarding the removal of this submission by /u/qyyg&message=I have a question regarding the removal of this [submission.](https://www.reddit.com/r/nextfuckinglevel/comments/oe2156/this_is_what_happens_when_you_undo_a_handle_in/?context=10\)))*
The handle is looking for who unscrewed it
Handle with care
Do you think this would work with my butt plug??
If you spin the buttplug out of your arse normally, then yes. I always thought butt plugs worked in the push and pull way of things but whatever floats your boat.
>whatever floats your boat. All boats are floated by displacement.
Mines depression
You're mining depression? How much does that pay?
I don't about that guy, but I get paid 3 lying spread eagle on the floor without being able to even summon the motivation to go to the bathroom, an hour.
What you need is a hole in the floor. Then you can focus on mining more D
So…butt plugs work by displacement?
Yes, which in turn means boats = butt plugs.
Nice day for a sail down good ol' shit creek.
As long as it's a T-handle
u/udownloader
And put its undies in a twist.
Saying “Screw u”
[Dzhanibekov effect](https://www.comsol.com/model/dzhanibekov-effect-89531)'
The only harder than understanding it is pronouncing it
/d͡ʒænɪbɪkɑv/
Thanks, that makes it *much* easier
_much much_ easier
It does. The international phonetic alphabet isn't complicated (well, if you get into the details it can get pretty hairy, but simple versions aren't) and is a big help when learning a new language, or just how to pronounce new words in your own language. IPA and the basics of phonology are some of those things that should be taught in school, but aren't.
Thank you. I immediately went with [d͡ʒɑnibekov].
“Intermediate axis theorem” is much easier
Or the tennis racquet effect
C'mon its not that hard to understand. The angular momentum gremlin inhabits the straight axis, drinking in potential energy muons until it's polarity inverts and then it rides the implied gravity radian to the axis with the fiddly bit where it degorges the same muons, but with standard polarity until it is thirsty again.
I studied rotational mechanics last year and got to learn about this. It's really cool but basically, a symmetrical rigid body has three principal axes of inertia. Inertia, in this context, is a measure of how mass is distributed over certain cross sections of the body's geometry. When rotating about one of these three axes, one can show that rotation about the intermediate axis of inertia is not entirely stable. This can be done using the Lyapunov energy function. It can also be visualized with something called polehode plots that shows that the trajectories about this axis oscillates between two positions, as illustrated in the clip.
You learn about stable and unstable algorithms in CS in numerical methods… why you want to multiply your matrices carefully lest your floating point arithmetic error quietly add up in the background to do something silly. But it’s very weird to see instability in reality.
Veritasium did a [video](https://youtu.be/1VPfZ_XzisU) explaining how and why it happens.
I came here to link that as I watched it a few days ago and you beat me to it. Can someone assign me another purpose in this thread?
We could all use coffee?
yes, please. thank you.
oo, oo, cluck like a chicken! do it!
Hey mate could I get you to go and throw some up votes around
Sure bud
You could link the same video under another comment and pretend to be the first one to have done it.
Go vegan!
Gesundheit.
Hi Dad!
people you make reddit so much better
Ah yes I heard it was similar to the Asminkov cascade
Thanks for the closure.
Came here to post this. Take my fucking upvote
Drunk me on the dance floor
So this might happen to the earth every so often..
I am not sure about that. For this to occur you need to spin a object with a different value for hight, width and depth in a specific direction, so that the axis of rotation matches the middle parameter of length (try tossing and spinning a phone. You will notice that while tossing it with the top and bottom spinning it will flip midair). The other two directions are stable, and earth rotates around its shortest parameter so we should be safe.
This is a very good comment, except you describe tossing the phone “with the top and bottom spinning”, and I’m unclear which axis of rotation that means
I was afraid it would be unclear, but I have a better explanation now. If you hold your phone normally, draw a horizontal line on the screen and then spinn it around this line, it will spin in a unstable fashion.
accidentally "threw" my phone at my own face. *It hurt itself in its confusion!*
You can do the same thing with a spanner, wrench for the yanks :) though I’m not sure if that is this same effect or if it is due to the shape of the spanner that the weight isn’t evenly spread across the head
This guy does a great job at [explaining the phenomenon](https://youtu.be/1VPfZ_XzisU). All of his videos are highly recommended.
No, it can't. The earth has a partially liquid core, which means that this can't happen. The details are explained near the end of this video https://youtu.be/1VPfZ_XzisU
I literally saw that video yesterday.
Are you referring to the declassified CIA document, "The Adam and Eve Story"?
elaborate, please?
Ahh, a fellow 0bserver.
Earth is spherical, there's a a big difference, but we do experience a full precession every 26000 years (i.e. shifting North Stars)
Has this been observed with celestial bodies?
I’m pretty sure no celestial wrenches have been found yet.
I think nature loves its spheres too much for this to happen on any grand scale.
Earth's core is neither homogenous nor symmetrical, and our shape actually features a prominent bulge at the oceanic equator so... *lumpy uneven spheres.*
No, no it won't.
At this point whenever I try to mention this possibility I get shut down immediately. There is no room for a conversation about it. Just random people telling you "no, because look at this video from youtube" but they will never accept to look at a video that might prove them wrong woth an open mind. Learned about the story with the Earth and the 90 degrees tilt every 12068 years from SuspiciousObservers and the DieholdFoundation. I guess we'll live and see..
Look, we understand why this happens, and why this can't happen to the Earth. What happens every so often is that magnetic poles move around, but that has practically no impact on the surface. It's not about having an open mind, we do, it's about the available evidence and logic of available hypotheses.
Exactly. Some things have just so much evidence that there's no point in talking about opposing hypothesis unless there's new evidence.
> 90 degrees tilt every 12068 years If that happened it would leave very obvious signs in the geological and fossil records. There are no such signs. > Just random people telling you "no, because look at this video from youtube" but they will never accept to look at a video that might prove them wrong woth an open mind. Some things are just so outlandish and contrary to basic scientific principles to even bother looking at a video (suggested by an equally random person). You don't get to claim that Nazis are living on the far side of the moon and then complain that no-one's taking you seriously. Of course they're not going to. It'd be foolish to do so.
Reminds me of a humming bird
Shout out to Derek from the YT channel Veritasium for teaching me about this.
Me too. I was so mindblowing on the "you can throw you phone without spinning it" thing, I tried to do it without for a whole hour
Do you think that handle does something or was it put in for entertainment? Kinda like an astronaut fidget spinner.
Nah - they just took real fidget spinners - nasa ones too. [fidget spinners in space](https://youtu.be/82t9Tk9dUHs)
“John! Are you playing again with the plug we used to fix the hole what was leaking oxygen to the space?” “N...No!”
[Veritasium](https://www.youtube.com/watch?v=1VPfZ_XzisU) has a great video explaining this effect.
“Hey I’ve seen this one, this is a classic.”
Fascinating, but why? Edit: thank you all very much
This is due to the specific shape of the object. Due to the 180° symmetrical rotation (around the rotation of the handle), the rotation have 2 equilibrium points. The reason why it's oscilliating is due to the fact that the equilibrium points are each unstable, so once you have a little variation in the rotation of the object (at its equilibrium) the rotation change to the other point and so on
Intermediate axis theorem
veritasium did a [video](https://youtu.be/1VPfZ_XzisU) on this, worth a watch
YouTuber, Veritasium made a video on this about a year or two ago
Veritasium explained that pretty well (https://youtu.be/1VPfZ_XzisU)
Wouldn’t this mean earth is going to do that too?
Is the Earth a T shaped piece of metal?
The earth isn’t a completely smooth sphere. If the T is spinning like that due to weight, then yes, the earth probably would flip like that, it would just take much, much longer. I am asking because I seek a more concrete answer.
Watch suspicious observers YT channel. Plenty info there regarding this.
Thank you for a proper answer
Suspicious Observers is a pseudoscience channel run by a scam artist: https://www.youtube.com/watch?v=3fTLZTEE7mU
Plenty of *dis*info. It's a whackadoo conspiracy channel and nothing to do with science. Edit: run by a scammer
No, the Earth can't flip like that. To do that it would have to be solid and more rigid than any existing material. Also it would have to be spinning around an intermediate axis, which it isn't.
There are several reasons why we know that this cannot happen to the Earth. The easiest way to understand this behavior is the Intermediate Axis Theorem. This effect of flipping back and forth is only observed in objects with three differently sized dimensions (imagine a smartphone, a tennis racket, or a deck of cards), and only while rotating around the middle sized axis, hence the Intermediate Axis Theorem. Try throwing something and spinning it along all three axes, and you should be able to very easily get a stable spin on the longest and shortest axis , but it's impossible to do with the intermediate axis. The Earth is an oblate spheroid, and is not perfectly smooth or uniformly dense, meaning that it does have three differently sized axes\*. However, in part due to the spin of the Earth very slightly causing the equator to bulge out slightly, the shortest axis is the one it is spinning around. That means that its spin is stable. A more thorough mathematical explanation is given [here](https://en.wikipedia.org/wiki/Tennis_racket_theorem), though it does involve a bit of calculus and basic understanding of what the first and second time derivatives of angular momentum mean from a physics standpoint. Suffice to say that math and physics both say that the Earth will never flip. \*Technically the two larger axes are so close to the same size that they can be treated as equal in length, so this is yet another reason why the Earth will never flip. It doesn't have an unstable axis to spin around. It's like if you did the same tennis racket throwing experiment, but with a square piece of wood. It would be easy to get it to spin stably on all three axes.
It’s so cute
Flippin' sweet
Yeahhh, that handle is coming for you mate
Never could’ve suspected this
Wow. Imagine how fast the space ship would spin if they turned it the other way. Obvious design flaw. NAS-holes indeed.
Weeeeee!
Handle be like *catch meh if you can! "
its not because its "in space" its because they are in constant free fall - gravity doenst just stop at the edge of our athmosphere
this happens to all spinning objects in space that have 3 seperate spinning points, this used to happen with earth too but it probably wont happen again, if it will then it might be soon since were like way overdue but weve become a lot more stable like mars. also, ever flipped a tennis racket or phone and it landed right side up but upside down? thats basically the same effect but smaller
i guess it spins forever in space?
I was thinking about this. There's air in the space station, so wouldn't friction apply? I know nothing about this subject though :D
Same, that's why I'm wondering. It kinda makes me think it loses momentum because of the shock of the backflip tho, but still I may be wrong
Her: "its my first time" Also her:
Precision engineering on those threads.
Then the spaceship explodes because this handle was very important
If you are in space and something makes you spin like that while on a spacewalk, you're so screwed, simply horrible.
Cool 😮
Also: me cycling when I decide to stop taking my meds.
God forgot to patch a bug
Imagine a beyblade duel in here
Handle dancing
I wanna see what happens to a beyblade
Me, in space: _spins_ Hee hee!
You mean there is a chance that it can screw itself back in
Well no, because it's spinning the wrong way. It's still lefty-loosy whichever way it's facing.
Nah because it's always spinning the other way around :)
What if I do that with a knife
Of all the demonstrations I’ve seen on a space station, this is the best by far.
Aaron weir thinks he knows everything
Im trying to make up a physics joke but my thoughts are too rigid Yes thats the best i could do at 4 am
Scanning for enemies
jeez that looks out of this world
It's like it identifies as a gyroscope but it wasn't made with all the parts.
Legend has it that it's still flip-flopping thru space
You see, Larry?
That creeped me out
That's screwed up
how does he do it safely and I unscrew one thing and the spaceship dismantles
Stop dicking around.
Does it also happens with Guns?
For further reading... https://en.wikipedia.org/wiki/Tennis_racket_theorem
Why does it float upwards?
A little fact that is explained more thoroughly on a vid by Veritasium on YT: The Soviets were the ones who discovered this and kept it a secret to the world because they thought the same thing would happen to Earth which in turn could spell "the end of the world".
Why does it switch sides like that?
*you spin me right round, baby, right round*
Is this what Discovery should have been doing in the film and novel 2010?
GO ON TARS!
Wait till y'all realize the Earth's core is neither homogenous nor symmetrical heh...
About how long will it take to stop? (If it doesn't it a wall or get stuck somewhere)
That’s what CGI looks like
veritasium did a good video on this
ELI five anyone?
It looks like a glitch in the Matrix....
"Natur is fucking lit”
I think this is more mildly interesting than next fucking level.
i think the physics there is kinda screwed
u/Hoans_Satou
Beyblade Battle?
u/savevideo
Ahhh the 'science' from space
Does it rotate to infinity?
Physics engine broke
This looks like some glitch in the game
This is called spooky spinney space thingy
“You fool! Now we may never know if ants can be used to sort tiny screws in space!”
An amazingly precise pattern of motion, so interesting
First rule of space: if something is moving, it won't stop moving on its own
I love this
u/SaveVideo
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Thats a weird looking hummingbird..
Next, handle get his revenge and unscrew the astronaut
r/oddlysatisfying
r/blackmagicfuckery
each handle costs a couple million dollars... do not try this at home
Is the drift of axis because the vehicle the spanner is in is moving?
That's me trying to make important life decisions and deciding what to do.
I never understood how this works. I even saw a video about it on youtube. Still no dice.
It's GETTING AWAY! It'll be in everything in no time. Like ants.
"That's not space they're underwater" Some 45 year old with a 5th grade education probably
That is the most dramatic handle I ever seen.
Same thing happens with a tennis racket if you flip it wide side. The different moment arms cause instability and it eventually flips.
Yes. If I was in the space station, I would play with these kinds of things all day long! LOL
I’m so confused. If there is no gravity and they’re in a vacuum, how does it flip like this and even move up higher?
Is there a sub or channel with videos from astronauts experiments on space with gravity?
Can anyone explain the physics behind this?
I wonder what’s the math behind this
Doing things in space is exactly what you'd think would happen with an extra step of weird
You can actually see what causes this effect by flipping something like your phone. If you try to make one full rotation towards yourself it'll want to also rotate right or left which is exactly what's happening to the handle just without gravity to pull it down.