Sep 21, 2021 2:44 AM
oldbaldjewishman
107990
1390
9
Spearo
Where can I get one?
knowallknownothing
Can someone please scale this down into a desk toy like those five balls on a string. I want this.
seyne
Just a double pendulum with extra steps
Dasnekones
It's not though. The double pendulum don't have a counter balance
Moving the center of mass of one of the pendulums doesn't make it not a double pendulum
Nsturge
Is this any different than regular double pendulum? I would assume it would be the same with a bar with the same center of gravity.
unnecessaryweevil
In this house, we obey the laws of thermodynamics!
xuumo
My eyes wtf
jinxed87
Can, someone tell this guy he made a perpetual motion machine? Quick... Before big oil kills him off.
Koosolek
How would it work in space? ?
CloseEncounter
tkochhar
Well this is mesmerizing.
kislehobb
Reminds me of the tentacle with the knife
Earwiglet
Me, trying to dance
jojomabobo
I really don’t like that I can’t predict the movement
PamiroM
I want this. My children wouldn't get any homework done but I want this.
rampantrubber
Apothecarius
That would make the pit and the pendulum a lot scarier.
AnOldDude
Sauce: https://youtu.be/foxqlkQ1VBA
Boopdoot
Ball bearings on this thing gotta be SMOOF
smadge1
You are getting sleepy…
SupposablyPersnickity
Me too, ringbar pendulum. Me too.
Icantgoogle
Does the ring slide and pivot on its bearing or only pivot?
Pseudomenos
https://tenor.com/view/ross-geller-pivot-friends-gif-12112721
ProudAussie
Robot Olympics
WeaselBandit
I liked it when it turned around
grumplestiltzkin
I'm 100% confident that the laws of physics are being obeyed, but man it looks like they arent.
ThisIsntMyActualName
Teddy2Ready
Does not compute
JustMe4455
Finally, something with worse rhythm than me.
YouWereSupposedToBeBulletPoints
aaaaah! I couldn't figure out why this video irked me. That's it! That's exactly it!
3KnucklesDeep
I'd high-five you for that comment, but if probably miss.
HuskerCO
3lda002
MandorSawall
That's debatable.
Insomnia297
mandrew01
?1
doomsdayaddams
These have always looked to me like damned souls suffering fiery torment.
illtakeasideofkittenswiththat
Skyjack567
I've always wondered if this was intentional.
dancingbarefootonlego
keystotheairlock
I can take the stairs two at a time
purdhapley
This is exactly what I thought of
TheSmallTennisRaquetUsedToStunFlies
There's a maths equation that describes that
SexyAttackHelicopter
Isnt this the chaos one? Or is that a triple pendulum?
maddeninglemon
A math equation that is guaranteed to get the wrong answer in the real world - The best kind of math.
Sickpup666
Go home physics, you're drunk?
Sadly it's part of chaos theory so good luck.
BendadickCumabatch
No. It's only "chaos theory" if you envision even a normal pendulum being randomly struck by air molecules, and bearings with stick-slip.
It is chaos theory because it's behavior can't be predicted with any sort of certainty beyond a small timeframe.
quadraspaz1
It's similar to the 3 body problem isn't it?
Higure
3 body problem has a pretty simple equation, with forces, and thus acceleration, only dependent on the distances. A double pendulum, 1/2
on the other hand, is a mess, because the forces also depend on the velocities of the two pendulums, and not on an easy way. 2/2
Becker37
It equals 42
thatsecondweirdguy
You might be right, but it's most likely going to be some Fourier series bullshit.
I learned to hate Fourier.
The man or the method?
Back then I wouldn't differentiate.
Something like this. Not quite, as this equation makes some simplifying assumptions that don't hold here.
komododave
I remember dynamics being deceptively simple. It looks complicated as fuck, but if you understand the pattern, you’ll get it.
Working out the forces in a double pendulum is tough as hell. Go the Lagrangian route instead. Mush easier to work with energies here.
I’m glad someone remembers it. It’s been 12 years since I took that class and that info is gone. I got a good grade though.
Niicollage
I have to take your word for it...
I haven't double checked. I just image searched "double pendulum equations" and took the first result that looked reasonably familiar.
lucifer63
Average imgurian googles double pendulum equations and sees something familiar, is this the real life
The main assumption is that each of the two moving parts is a perfect pendulum, with all the mass concentrated at the end.
MarsIsAfire
assume a spherical cow
Tjk3
This equation is call the Vatz distribution and describes the cylindrical pattern of sound waves at the molecular level.
ZippityZap
Huh. I thought it'd just be {-x;y???}
guyanesebro420
I boy that takes me back.. i have worked out that problem a few years ago in class. Not a fun time, sooo many pages of math to get to that
It's half a dozen lines of math if you go the Lagrangian route. Sure, some lines look like that one, but it's quick and no heavy thinking.
Yes but my professor made us explain each line of math with english showing we knew what we did in detail so it became a lot of mathematica
IchNicht1
Kudos to your prof making sure you actually understand what you are doing and not just spew out a formula you learned by heart.
Navrodel
Technically, yes. However, it's so sensitive to exact starting conditions that it's effectively worthless for predicting motion.
Spearo
Where can I get one?
knowallknownothing
Can someone please scale this down into a desk toy like those five balls on a string. I want this.
seyne
Just a double pendulum with extra steps
Dasnekones
It's not though. The double pendulum don't have a counter balance
seyne
Moving the center of mass of one of the pendulums doesn't make it not a double pendulum
Nsturge
Is this any different than regular double pendulum? I would assume it would be the same with a bar with the same center of gravity.
unnecessaryweevil
In this house, we obey the laws of thermodynamics!
xuumo
My eyes wtf
jinxed87
Can, someone tell this guy he made a perpetual motion machine? Quick... Before big oil kills him off.
Koosolek
How would it work in space? ?
CloseEncounter
tkochhar
Well this is mesmerizing.
kislehobb
Reminds me of the tentacle with the knife
Earwiglet
Me, trying to dance
jojomabobo
I really don’t like that I can’t predict the movement
PamiroM
I want this. My children wouldn't get any homework done but I want this.
rampantrubber
Apothecarius
That would make the pit and the pendulum a lot scarier.
AnOldDude
Sauce: https://youtu.be/foxqlkQ1VBA
Boopdoot
Ball bearings on this thing gotta be SMOOF
smadge1
You are getting sleepy…
SupposablyPersnickity
Me too, ringbar pendulum. Me too.
Icantgoogle
Does the ring slide and pivot on its bearing or only pivot?
Pseudomenos
https://tenor.com/view/ross-geller-pivot-friends-gif-12112721
ProudAussie
Robot Olympics
WeaselBandit
I liked it when it turned around
grumplestiltzkin
I'm 100% confident that the laws of physics are being obeyed, but man it looks like they arent.
ThisIsntMyActualName
Teddy2Ready
Does not compute
JustMe4455
Finally, something with worse rhythm than me.
YouWereSupposedToBeBulletPoints
aaaaah! I couldn't figure out why this video irked me. That's it! That's exactly it!
3KnucklesDeep
I'd high-five you for that comment, but if probably miss.
HuskerCO
3lda002
MandorSawall
That's debatable.
Insomnia297
mandrew01
doomsdayaddams
These have always looked to me like damned souls suffering fiery torment.
illtakeasideofkittenswiththat
Skyjack567
I've always wondered if this was intentional.
dancingbarefootonlego
keystotheairlock
I can take the stairs two at a time
purdhapley
This is exactly what I thought of
TheSmallTennisRaquetUsedToStunFlies
There's a maths equation that describes that
SexyAttackHelicopter
Isnt this the chaos one? Or is that a triple pendulum?
maddeninglemon
A math equation that is guaranteed to get the wrong answer in the real world - The best kind of math.
Sickpup666
Go home physics, you're drunk?
Dasnekones
Sadly it's part of chaos theory so good luck.
BendadickCumabatch
No. It's only "chaos theory" if you envision even a normal pendulum being randomly struck by air molecules, and bearings with stick-slip.
Dasnekones
It is chaos theory because it's behavior can't be predicted with any sort of certainty beyond a small timeframe.
quadraspaz1
It's similar to the 3 body problem isn't it?
Higure
3 body problem has a pretty simple equation, with forces, and thus acceleration, only dependent on the distances. A double pendulum, 1/2
Higure
on the other hand, is a mess, because the forces also depend on the velocities of the two pendulums, and not on an easy way. 2/2
Becker37
It equals 42
thatsecondweirdguy
You might be right, but it's most likely going to be some Fourier series bullshit.
TheSmallTennisRaquetUsedToStunFlies
I learned to hate Fourier.
thatsecondweirdguy
The man or the method?
TheSmallTennisRaquetUsedToStunFlies
Back then I wouldn't differentiate.
Higure
Something like this. Not quite, as this equation makes some simplifying assumptions that don't hold here.
komododave
I remember dynamics being deceptively simple. It looks complicated as fuck, but if you understand the pattern, you’ll get it.
Higure
Working out the forces in a double pendulum is tough as hell. Go the Lagrangian route instead. Mush easier to work with energies here.
komododave
I’m glad someone remembers it. It’s been 12 years since I took that class and that info is gone. I got a good grade though.
Niicollage
I have to take your word for it...
Higure
I haven't double checked. I just image searched "double pendulum equations" and took the first result that looked reasonably familiar.
lucifer63
Average imgurian googles double pendulum equations and sees something familiar, is this the real life
Higure
The main assumption is that each of the two moving parts is a perfect pendulum, with all the mass concentrated at the end.
MarsIsAfire
assume a spherical cow
Tjk3
This equation is call the Vatz distribution and describes the cylindrical pattern of sound waves at the molecular level.
ZippityZap
Huh. I thought it'd just be {-x;y???}
guyanesebro420
I boy that takes me back.. i have worked out that problem a few years ago in class. Not a fun time, sooo many pages of math to get to that
Higure
It's half a dozen lines of math if you go the Lagrangian route. Sure, some lines look like that one, but it's quick and no heavy thinking.
guyanesebro420
Yes but my professor made us explain each line of math with english showing we knew what we did in detail so it became a lot of mathematica
IchNicht1
Kudos to your prof making sure you actually understand what you are doing and not just spew out a formula you learned by heart.
Navrodel
Technically, yes. However, it's so sensitive to exact starting conditions that it's effectively worthless for predicting motion.