Coupled Pendulums - Sixty Symbols

[MrStardust85]

he's a witch!

[sriharijayaram5]

this cant be perpetual motion rite? it is goin to stop isnt it?

[okmarshall]

@sriharijayaram5 Yes it will eventually stop. Energy is being lost due to friction with the air (air resistance) so the amplitude of the swings will get less over time.

[AsciaBipenne]

Why the fuck you scientist love so much cream eggs?

[maloney670]

Did that say Eggsperiment?



[Muzikman127]

@maloney670 ohh yeah

[TheKiketag]

@Esudao becareful last person who got choose to accomplishing that died all of a sudden and his research disappeared

[QuantumChance]

I love these vids!

lol even a caution to using dirty needles - so thoughtful. :D

[RakanTaijo]

Is there a way to set this so that it can never stop ?

[nhmllr725]

@RakanTaijo In an ideal world yes, but because of air resistance and friction in the string you can't.

[Esudao]

@RakanTaijo you could put it in a vacuum and make the strings up of magnets, then it would last pretty long

[aei05h1]

@RakanTaijo If you can make this so it will never stop you will be a VERY rich man!

[MightyJustas]

What kind of black magic is this?!!1

[FueledByDaria]

Witchcraft!

[brunzmeflugen]

I f these two eggs were in a hypothetical situation where there was absolutely nothing but this device,and nothing else to interfere with them,could the eggs reach absolutely no movement at some point in time?

[UncleKennybobs]

@brunzmeflugen With nothing else in the Universe there would be no gravity for the oscillation to occur. You wouldn't have a pendulum at all, just two eggs tied to string. What a dismal Universe!

[mikeVII]

'use hygienic needles if you're gonna eat the eggs afterwards'

was that a bad joke?

[phelepone]

could this pattern be applied to two sound waves passing a frequency between them?

[ItachiUchiha004]

this guy is fun to watch! he teaches really well in every video...

[pedrosopi314]

Press repetly the numeral keys from 1 to 8 for a crazy remix!

[Coolstevnar]

Wow isn't nature wonderful

[jagara1]

Great eggsplanation of an eggstremely interesting phenomenon for ordinary yolk like myself ;)

[tahirpatan]

I was waiting for him to eat them.

[sanchodayus]

Thats cool

[Freakinawesomeize]

That was absolutely crap

[TowlerAndTaylor]

I watched this to see "conquers" with creme eggs, not to have a science lesson?!

[simonspaz]

My Favourite part was where the creme eggs were hanging from the string. That was the best. I will remember it fondantly.

[jonsynergy]

Holy oscillations! That's eggcepional

[CrackPOPBoom]

The only thing I like about this is the chocolate egg /: mmmmmmmm...

[simonmaersk]

Thumbs up if you came here to listen to Pendulum music

[SAFENAFE1985]

I find this very difficult to masterbate to

[SAFENAFE1985]

Fake

[johnclavis]

What a delight!

[msasaif]

Just a bit sad lol

[Ziggletooth]

guys um... whats with the product placement?

I sort of wish you went into more detail

[Tpcerullo95]

Thats awesome and tasty too!! :)

[Midtowner321]

Awesome!

[EpicJumpGames]

Nice

[omerta410]

it's not magic... it's pure magic!

[dondude69]

I've never seen that.

Cool!

[G3org3Master]

Fools

[oingoinegro]

Cool

[lewisp1981]

Cool

[cathy1300]

Cool

[philotop]

Cool

[MegaHboy123]

Cool

[MegaHboy123]

Cool

[padbratt]

Cool :D

[mrmattymcbride11]

Wow

[abbeychamp1]

No one cares man, Bout our science!! All everyone cares about I the creme eggs! Just eat them FFS!!!

[MegaFox3000]

Man just eat the god dam cream eggs already FFS

[NucLearPaNdA100]

Yeah, I just eat my eggs..

[FrankiLanky]

I would eat the cream eggs

[2fallenangel]

Yeah cause I really have loads of hygienic needles lying about

[TheDronnyowl]

I thought he would smash the eggs :[

[kieranwilde1]

What a waste of a egg

[Reganf0zzy]

It's how the strings are aliened with eachother

[MrMadkris123]

Great bit of siance

[LynxChan]

These are easily the most watchable and engaging physics videos around. Still, your uni seems to be blessed with the most charismatic and good-natured physics department in the world.

[simonjtyleruk]

Didn't use creme eggs showing me dynamics when teaching me! Kids of today don't know they're born!

[0Linerider0forever0]

How do they continue for so long, they don't continue indefinitely... Do they?!?!?!

[HeatherMeadow]

Yay! Eggs!

[MasterScottStreet]

EPIC. You make science worth learning about!

[Xenctuary]

What about heroin needles?

[T3rM1n8TOr]

Dammit! I only have unhygenic needles :'( I hate EASTER!!!!!!!!!!!!!!! freaking pendulum/ penduli always putting a downer on my day :/

[gregperry84]

WTF hygenic needles?!??!!

[frazdude95]

Awesome

[MelleB90]

I only have used heroin needles here, so no go for me.

Good vid though! ;]

[Whi5t1eR]

Cool video

[lewys258]

Coupled oscillators are cool!! Happy Easter everyone!

[anklemike]

Egg-cellent piece of physics!

[gamper33]

Physics is the shit!

[SianLeigh16]

I skipped to the end because u thought they was gonna smash together or something fun like that....

[CorePurple]

Clever stuff. :)

[swntrancex]

Now Kraft have 'arrived' creme eggs will never be the same. :((

[andytheweb]

Does chaotics come into this or is it all linear? Bit like a harmonograph ;D

[oliverwillmoth73]

That's well cool:) lol

[n0offence]

will that keep going for ever??????

[foxmcloud555]

@n0offence No, but it will keep going for a quite a long time.

[n0offence]

@foxmcloud555 that would have been an awesome solution for energy generation.

[SirTeeGeeEss]

@n0offence As a general rule, if you come up with a 'simple' way to get infinite energy - you're wrong.

[milesskylighter]

PUSH ZACK RYDER GODAMMIT!

[iAMxWiL]

Subbed, I loved this video and by the looks of your previous videos, I will love the ones to come.

:)

[NurseDakotaLmfao]

For once in my life, I have listened to a science lecture. :3

[milesskylighter]

PUSH ZACK RYDER GODAMMIT!

[FlubberfishVideos]

That is so cool!

[MrIRISHification]

can i have the eggs plz??

[ARHBritain]

Rather interesting = )

[iTzRuBeNxHD]

does it ever stop ?? i could ,make an out of date office toy :3

[Kendrana]

@iTzRuBeNxHD Yes, it'll eventually stop due to air resistance and some of the energy being propagated away as heat energy.

[iTzRuBeNxHD]

@Kendrana i didnt understand that??

[Kendrana]

@iTzRuBeNxHD When you move something, some of the energy is released as heat, eventually all the energy will be gone, causing the pendulums to stop moving. This stops even faster because of the air pushing against the object, thus requiring more energy to move.

[sun6021023]

@iTzRuBeNxHD It has to stop because energy in the universe is conserved.

[UlyssesKrunk]

@iTzRuBeNxHD PERPETUAL MOTION!!!!

[alancheira]

@iTzRuBeNxHD Of course it would stop, you always have dissipations throught friction with air, friction between the fibers of the rope, some other dissipations about the elasticity of the rope, and so on.

[Bowser899]

@alancheira my god

[Bowser899]

@alancheira my god



[1997xander]

@iTzRuBeNxHD

Second law of thermodynamics, you'd have to have some force to keep it going.

[musmoh19]

@iTzRuBeNxHD the friction against the air would eventually stop the eggs, so yes, it will eventually stop

[r4h331io]

that was pretty scnazzy :)

[Zmaczimum]

This is a GOOd Experiment!

[31298adamjames]

wow

[happygangsters]

@irategoblin haha lol your such a twat lol...just coz he knows things and you know shit lol

[sfurner]

@happygangsters LOLOLOLOL

[HannaHarryHavoc]

I love this :D

[jakassjunior123]

just smash the eggs already

[rovingrover17]

if anyone is interested in further research into oscillators, look up Professor Ian Stewart from the University of Warwick. He modelled animal gaits with many different oscillators representing legs.

[ViPxUnToUcHaBlE]

will this ever stop ?

[rovingrover17]

@ViPxUnToUcHaBlE Yes, because no system is 100% efficient. Here there is air resistance.

[niallsh]

who would dislike two cream eggs swinging on a string

[Kdodzz]

I dunno why, but i find this amusing

[zac2806]

TEST TEST WE MUST TEST!

[Willyireland1]

Mother fucking A level physics!

[greenrots]

How much are Cadbury paying you for this?

[Edbrad]

Cool video btw

[fablan6]

But I loved the egg experiment. It could be the key to infinite energy or something :P although I think that's already found by Tesla so... And if you could find infinite energy nobody would let you apply it :(

[fablan6]

Oh why did you write the name that way? Ψ = Ps, γ = g and Φ = F

You could use letters that have the same meaning!

-_-

[TheFootballwolf]

proof that science can be fun :)

[supersesqui]

My wife has never completed this experiment successfully................wh­en the hankerchief is removed both goo filled chocolate eggs have disappeared.

Can't understand it !

[hanvirklair]

@ronoc9 perpetual motion is impossible...

[gabcho1997]

Don't be stupied everyone there is a maggnet underneath the table so that's how they move if u agree thumbs up!

[kevcahill89]

@gabcho1997 You have obviously never seen it done in person. There's no magnets. Go try it yourself.

[THEROLLEO]

That was very educational, thank you very much and have a nice easter

[wi11ym]

I never knew the power of creme eggs!

[MattyMcGregor14]

Wish i had a Physics teacher like this. Id pay more attention

[ronoc9]

Question: Will it stop entirely over time or is this an example of purpetual motion?

[Edbrad]

@ronoc9

-

hehe, yes it will stop eventually. There is no such thing as perpetual motion. Some machines people have built seem like perpetual motion but in reality (assuming they aren't fakes and many are) are using frictionless elements, but to get energy from it you would need to introduce friction and therein lies the problem. The only real "free" energy is using nature to generate power for you from wave, solar, wind etc.

[NiceGuy1405]

1) Put eggs on string

2) Bang Eggs *insert childish laughter*

Simple, yet so very interesting

[michalchik]

What happens if you couple 3 eggs?

[BigDH28]

I think its great what you guys are doing! Cheers!

[stsrawmos]

some body hurry up and see what happens with three then tell me hahah

[RaraBeretta]

and for how long can they swing like that before they stop?

[ELuhn]

Should a middle-aged man be swinging his eggs around like that?

[pieinthehouse]

I was really hoping it would be how much force to break the eggs lol! Next year may be?

[ndewhurst12]

Scientific videos carrying the theme of a religious holiday. I am tickled with the irony.

[rageagainstthebath]

If I remember that theory well, a funny thing would happen with the other egg on three times longer string. This should work more or less the same, but the egg on longer string would oscillate slower. ;)

[SnapShow82]

One person doesn't like coupled oscillators!

[jab0805]

I love these videos! Thanks for sharing.

[john37309]

Good fun video!

Thanks Brady,

John.

[FrankCashio]

Witch!! burn him!!

[CaligulaBoots]

Harmonic resonance?

[harapanong]

Hi

I would like to know which magician the professor was referring to. Thank you!

- harapan. magic!

[MrOldprof]

@harapanong

Paul Daniels

[AlchemyFC]

Thanks for this, tomorrow I will ask some of my teachers on college about this.

[sumosumo84]

Is that because the waves of the top string and the connecter string cancel each other out? is that why they stop?

[sumosumo84]

hmmm. posted on 4/20. hmmmmmm..

[culwin]

It seems like British people are obsessed with Cadbury Creme Eggs... the ones in America aren't that good...

[andyct1982]

What would happen if more eggs were added?

[sixtysymbols]

@andyct1982 I don't know, but if you do the experiment make sure you film it for us!!!

[sporkafife]

@sixtysymbols We did a similar experiment in a Physics lesson. If you have many pendulums and you start swinging one, most of them will move a little bit, but one of them will be going crazy! I forgot why, something about resonance XD

[chotsmagic]

@andyct1982 my guess is that if you have a lot of them in series, one next to the other, and you start with the same procedure, you would see a transverse sine way if you look from the top. But thats just a guess.

[cthulhu11111111]

@andyct1982

"What would happen if more eggs were added?"

unbelievable. this is the problem with modern science. you are playing with forces you cannot comprehend. this is how nuclear disasters happen when scientists think "oh what would happen if...." and then get given permission to do their experiments. Why can't you scientists just be satisfied with two eggs doing weird things? why do you have to up the ante and play god? its like that collider that creates black holes just dont do it!

[andyct1982]

@cthulhu11111111 well i don't believe in any gods or the supernatural because I can in no way measure these force like I can measure forces in the natural world. But I suspect some facetiousness in your reply so I have no problem telling you that the more I learn from this existence right now and until I die the more complete I'll feel. I will admit that I get a very spiritual like feeling when I think of the order of magnitude when it comes to things like distance and time and energy levels.

[DrEMplushrest]

@andyct1982 Deliciousness would increase as found by the equation: D = I+E, where D is deliciousness, I is the initial number of eggs, and E is the number of eggs added.

[janeyanna]

This is what I see:

In relation to the string that connects the eggs, none of them is stationary after having been set into motion. It's only that at some point in the cycle the motion of the connecting string is such that it cancels out the movement of one of the eggs when watched from outside the system.

[captwasabi]

"Any sufficiently advanced technology will appear as if to be magic." Who knew you could accomplish that with 2 buttons, 2 creme eggs and some string!

[FHomeBrew]

I used a rusty nail found on a random bathroom floor at some gas station that was pretty busy even at 2:00 AM. Then I served the eggs to my guests. They enjoyed it and their stay at the hospital.

Nah just kidding! Hope I gave you a scare there ;-)

[YourSaviour]

I use part of this trick to stabilize the swinging things i picked up with the overhead crane in the workshop, by moving the crane back and forth.

[BibleRefuter]

So what happens if there are three?

[ZombieZephyr]

I love physics.

[LNOL]

WOAH!

[Tubilakken]

Brady Haran is the man!

[Eulich]

I love the videos, don't listen to the naysayers. Haters gonna hate. It would be nice if there was a link in the description box with the math and principles behind this though, for those who are more interested.

[Defonthana]

wow....somehow it is cute how roger explains it...so with a slow voice..xD sry...but i loved this video!

[Akhiloth]

Okay people, I get it, it's easter. I was just wondering why CREME EGGS in particular. Last easter it was the exact same candy, just a curiosity.