Wave pendulum

[verderider597]

I see the double helix. This vid is pretty cool

[compacttrickz]

We did some circular motion in physics a week ago. If you imagine the weights as the weights travel back and forth (basically along the path of the circumference of a semi circle) , you have v = square root of gravity x radius. (derived from... mg = mv^2 / r) so as gravity is constant. velocity is proportional to the radius of the string. Which is responsible for the pendulums swinging out of phase with each other.:)

[mcgorgomagan]

0:37 nyquist frequency

[realfuzzhead]

the ONLY thing that changes the period of a pendulum swing is the length of the string. They have it set up so that the longest one will make 51 to and fro' swings in 60 seconds. All the the ones thereafter (up to 15) have their string lengths set so that they experience +1 period's more then the one before it in 60 seconds, so the longest has 51, the last has 65. They then swing and make these different types of wave, beating and (seemingly) random patterns until rejoining at 60 sec <3 physics

[cambridgesouth]

Fascinating!

[T4ISHNA]

/watch?v=7_AiV12XBbI&feature=m­fu_in_order&list=UL heres a good demonstration

[Sandertjegoeteyn]

Pure awesomeness and beauty!

[eyescreamcake]

Discrete-time frequency sweep with aliasing!

[onesidequeens]

Dre Dreas beat lol

[nancyschimmel]

wavicles!



[chow5325]

How do I get one?

[zoonidon]

why does it happen ???

[BiTTjl]

@zoonidon It's the length of the strings. They don't show the differences. Look at other Wave Pendulum videos, and it gets explained.

[zoonidon]

@BiTTjl i did its cleared now thanx !



[zostro123]

What's it for???? Just a phenomenon of nature, like light or sound.

[Buklen]

terrible terrible quality

[ozricstormbringer]

no its not string lengths i think it has to do with each bearings atomic mass pushing the others away or pulling towards it , at object come closer thy effect the others around it and the combined effects of 2 or 3 bearings push the 4th one and so on

[nawgx2]

This is not an illusion. The strings must different lengths for the period of the pendulums to differ. T=2π(L/g)^.5

[SovereignBeing]

beautiful... whats it for?

[MadeinHell2]

Sooo... I'm guessing the strings differ in length... right?

[lesperancager]

@MadeinHell2 No, it has nothing to do with differ string length or weight. It is just an illusion....it looks like waves, but every pendulum is independent. The effect looks 10 times better, when you see it from side....here an example: /watch?v=yVkdfJ9PkRQ&feature=r­elated

[lesperancager]

@MadeinHell2 Sorry, I was wrong...Of course ist has to do with different string length, My mistake.

[unclebully7913]

Wait, I'm confused about the clip... so the cops knew internal affairs were setting them up???

[MythOfEchelon]

Ohh this is what they showed on Sixty Symbols a few weeks ago and challenged people to do it with more than 2 xD

[ShaneFitzJam]

woo thats my school

[distracted6]

life hacks

[natedejuggla]

i love physics :)

[sumipan9]

wait...so why does this happen?

[cballew57]

Thts LSD at best.

[gijsoerlemans1992]

duuuuuuuude

[MrLirete]

Awesome xD

[Vegatude]

How are the oscillators arranged? In the information box is says that they have varying periods, but are they still placed in some kind of order?

[DMassecar]

@Vegatude Yes they are arranged in an order. As far as I can tell the string length gets incrementally shorter as you go left to right

[SimonXR]

Mindfuck.

[Willyireland1]

This would be a great loading screen for a piece of software :P

[maplepop]

THIS VIDEO MADE A MAN!

[PH1ASCO]

beautiful

[Cropinky]

reddit

[Pederzen100]

This is fake. Trust me, i know wat im talkin bout, i can tell from watching quite a few waves in my life.

[lmlove80]

@Pederzen100 I dont trust people that says "Trust me"

[alearg89]

Damn Physics you scary

[TheDubCollector]

where can i buy one

[bryntittle]

How can anyone have clicked 'I dislike this'? How can you dislike awesome and beautiful physics?

[Mattja1]

@bryntittle well their problem lol, they can dislike the workings of our universe all they like but it's not ganna change for them :P

[DreamPharaoh]

This reminds me of a Carl Sagan's Cosmos that I saw last night; when scientists debate if the universe will expand forever or collapse. This looks like the energy levels of the particles from creation until the matter eventually becomes motionless and cold (after many billions of years using the expansion model.).

[jms61123]

looks a lot like dna to me during the double helix its incredible

[Entangle7]

Fake.

[idannedy]

can someone explain why it swings back and forth at a different rate for each ball?

[framegrace1]

@idannedy The only way to vary the period of a pendulum is varying its length.

Also, the period remains constant no matter the speed of the pendulum. That's why the effect repeats itself with the time but with less amplitude.

I studied that in first grade, it's one of the big Gallileo discoveries.

[idannedy]

@framegrace1

ah I see, I've learned about it too, but I only experienced only very short lengths so I never seen anything like this before. Thanks bud.

[bryntittle]

@idannedy Different length of string I assume

[Charlesincharge42]

Science rocks!

[mgdibtygd]

@Charlesincharge42 You mean science _rules_, sir.

[zwenx]

after numerous attempts, i have finally successfully masturbated to this video

[thepatrickowen]

I hate when my periods vary.

[halflife230]

This is done through the strings being of different lengths correct?

[tedlaver]

Seven people should shampoo my pubic hair.

[lolomgz]

WHO THE FUCK WOULD DISLIKE THIS?????

[TheMLBM100]

Oh science, why you so crazy gurl?

[gentyp]

Oh hey im in this class! Id be happier but im failing

[proRockTex]

order into chaos, back into order - in perpetuity....

[LeonSakau]

Cave Johnson, we're done here.

[abw5th]

So kool - so simple. the more toward the center the shorter the pendulum......the faster the swing of the ball - eventually they all catch up again and that is the end of the video 

[tragicitseems]

these are the things i like to watch instead of doing my homework

[Pat12151215]

God intended it to be this way

[WickedWyvernn]

@yoprofmatt

found why they do this yet? Because they seem to change their "frequency"

I want to read up on it, seems interesting.

[Reginaaald]

OSAMAAAAA

[Lonewolf6565]

@Reginaaald IIIIIIIIIISSSSSSS

[Reginaaald]

@Lonewolf6565 DEEEEAAAAD

[ownage999912]

This looks exactly how life would form. After a massive force and slowing down of all the building blocks of life, it slowly spins into a helix.

[Blindastronomer]

Pretty cool way of visualizing phase differences, thanks.

[alek21496]

Wowie caplowie.

[CeleryMuffin]

that was awesome

[lolernie]

I was hoping someone was gonna get kicked in the nuts.. This is not the internet I am paying for.

[HeartNotes3]

Looks like DNA... =)

[BushHatesMe]

They're on strings of a length that decreases from left to right to change the period.

[robopirinja]

Are you a wizard?

[beveledkunt]

@Peskymystic I'm sure you mean mass not weight. But, the mass would affect the inertia of the ball and therefore perhaps each ball has a resistance to beginning it's motion.  phys101 asshole.

[FreakEmpire5275]

5 people dislike science.

[yellowknife911]

0:22



[barnuner]

wat?

[yellowknife911]

1:22

[krugnasty]

That's cool.

Sined, the internet

[killingedge123123]

so cool. if you lean your chair back and watch the video as if you're panning over hills, it looks like it's going slower and slower at the beginning, then faster and faster at the end

[jiarb]

ARE YOU A WIZARD? Y/N

[AimiriZ]

:D

[dhamijay]

wouldn't this help explain the movement of micro particles?

[TotaLoco]

Rule 34

[bf2chewy]

T= 2π√(L/g)

FTW!

[MelissaZaps]

WHAT DOES IT MEAN?!

[FreeDownloads1]

O_O

[entropy111111]

are those strings different lenghts? why is superpostion of two waves happening here? wheres that second wave coming from?? aahhhhhhhhhhh

[egokick]

If I was to show an alien from another dimension a brief history of our universe, instead of explaining entropy, evolution, DNA, life and heat death, I'll show them this.

[PremusRed]

If only i understood the math behind this

[DjRoBGeD]

I almost disliked this video because it did not show the lengths of the pendulums before starting. As such I had to watch it over and over again to figure out their period!

[NexusofAvalon]

Did anyone else notice the strings are different lengths, or were we all too busy ohhing and ahhing about how it looks like a wave?

[BDGLZ]

/r/

[Regnberg]

Eye masturbation!

[KeegmasterFlux]

I like the part when it switches.

[mankey56]

omg that is so awesome how they do that! do they have magnets in them or something? :o

[batonrye]

@mankey56 Just balls on strings.... each has a slighter lower mass down the line so they have ever so slightly different periods in their pendulum motion.

[DjRoBGeD]

@batonrye The period of a pendulum is independent of the mass of the bob.

[jessi330]

It was very interesting because it had moments of clear visual recognition of wave pattern and times where just looked jarbled but changed again to recognisable, double helix etc before coming full circle to the very early wave pattern. Cool. cool. cool.

[thenoisyninja]

HES A WITCH! A WIIITCH! A WITCH!

[memberHD]

damn that is very cool

[Javelen]

It looks like a wave.

[omgpolly]

Wow.

[MrMadeintheuk]

0:41 It forms the double helix.

[thoras101]

Trippiest shit ever.

[beveledkunt]

Does anyone have any info on the lengths of the strings, or mass/density of the balls? This would make a cool class demonstration for summing waves of different periods for my class.

[colourkids1]

The bit with two waves is hurting my head :/

[younganton]

so complex, yet so boring.

[89koala]

The internet has at least 1 ignoramus who would rather be watching cars explode or what not.

[DaltonMan321]

@89koala Huh huh, you almost said "anus".

[HeartNotes3]

@89koala Up to 6 now...

[Jagg3d3d93]

I'm guessing the synchronization was done with some in depth Sine Wave calculus, just vary the input a little until you create sine wave movement that synchronizes.

[Shin00by]

I find this easy to masturbate to.

[Shin00by]

MY MIND IS FILLED WITH FUCK

[leshark]

so somple yot so ontorostong

[chatzimcfee]

My best guess is this is due to the air flow caused by the movement of the balls

[ouwildfire]

Could you please show the entire device? I am curious see how it was constructed

[WhatWouldBukowskiDo]

The balls have the same mass but the length of the strings are different, right?

[fume0ne]

SCIENCE #1

i like the bit where you can see 2 waves for the first time :) looks like a spinning helix

[teganyavo]

@fume0ne its not 2 waves, its 15 waves... thats just when 8 of them are in phase with each other and out of phase with the other 7

[shoney]

@fume0ne can't be unseen.

[alextheangry02]

@fume0ne

Double helix all the way!!

[TheMissingno]

Are they all coupled?

[yoprofmatt]

@TheMissingno

Nope, completely uncoupled.

[blazontroll]

@yoprofmatt how did you get them to swing like that uncoupled ?

[xanderjanz]

@yoprofmatt coupled by gravity :D

[Cakerolled]

@yoprofmatt

You have AIDS. See a doctor now!

[presbarkeep]

*BBRRGGHHHT!*  that was the sound of my brain exploding. this was that awesome.

[rvbman47]

I love how physics makes the simplest things awesome

[CosmicGnarler]

Looked like you had a nice DNA spiral there !

[NAXE5]

That is so friggin cool