How Long Will Newton's Cradle Move in a Vacuum? How Newton's Cradle Really Works

[@TheActionLab]

To be clear, the energy and momentum equations are not enough to solve Newton’s cradle as some have suggested in the comments section. For anything more than two balls you need more equations to get the appropriate solution. For example you could have one ball coming in at v and after the collision have one ball going -1/3v and two balls going 2/3v and that would solve both the energy and momentum equations, but that is not what happens in the Newton’s cradle. It is obvious you need another equation besides the energy and momentum equations in order to solve the problem...you need the dispersion-free energy propagation as I describe on this video.

[@viixzyt2726]

First time a normal comment got more liked than the owner

[@rashidisw]

I believes Newton's cradles are best demonstrated and explained using high-speed camera.

[@sethbettwieser]

If you're going to do a video about Newton's cradles, you could at least invest in a high quality one instead of an Amazon/Walmart one. A good one usually can last for around a minute before becoming desyncronized.

[@Justchillin429]

If you put 2 magnets together does it make them twice as powerful or the same power as a single magnet?

[@mufasateamnesquik8624]

What hapens if you mix dry ice and liquid nitrogen??

[@pewpewman18]

I love how you have a vacuum container and it’s the Newton’s cradle you need to buy

[@tapasiari9821]

😂

[@pardeepgarg2640]

🤦🤣🤣🤣

[@SuperDZ555]

😂😂😂🤣😂🤣😂🤣😂🤣🤣🤣😂🤣😂😂😂😂🤣🤣😂🤣😂🤣😂😂 👽 bogos binted?

[@odhiamboomondi8849]

😂😂😂😂😂😂😂😂

[@neelammittal4145]

I didnt get it?

[@d1st0rt3dsan1ty]

Newton's Cradles were so disappointing as a child when you realized they only last for a short amount of time, and not what was typically pictured in cartoons etc

[@connorpgames1126]

YES

[@petergoestohollywood382]

Thats because these cheep ones are pretty crappy... they Shake each other out of sync quickly and the friction from the air and fasteners does the rest. If you build them with longer rope and larger balls they’ll go for MUCH longer

[@ValidT]

@@petergoestohollywood382 😏

[@AbeDorf18]

i mean this is a *REALLY* crappy newtons cradle. even the one i own thats like $15 and still really crappy lasts like twice as long as this one.

[@frenchthefennecfoxmlp]

it was creepy in cartoons

[@nicholaslau3194]

One more thing to point out, notice that when the balls stopped bouncing but all the balls swing together in unison? All of the initial momentum eventually spread evenly over the 5 balls before coming to a standstill. A similar result can be achieved by using two mass-spring oscillators connected via a third spring

[@chrisg3030]

Does that explain the synchronizing metronomes effect as well?

[@mucaad]

huh

[@willmcquistan3113]

I feel like the mnetrenome thing would come into play, but I have no idea.

[@JackOSergius]

Actually this is the reason they stop bouncing, and not heat dissipation as OP said. Good observation.

[@SebastianGarcia-uy1vp]

Does that mean that I can have a vacation on Thursday?

[@virun2028]

If you’ve ever had under these before... *you know how how painful it was when your sibling went and got the strings tangled beyond restoration*

[@billybobwashington3880]

Yeeeeeeeessssss

[@bananatoffeepie]

*flashback of mildly infuriating pictures*

[@captain_ravioli1514]

I think there is a way to save them but it's harder than just buying a new one

[@jalenhumphry5297]

Jokes on you, I'm an only child.

[@dewbo1628]

Close your eyes and listen 1:14

[@sigal5542]

When you bout to beat yo meat

[@mccauleymccranie3752]

Lmao!!!!!

[@jaspercarlos7521]

Wtf!!??

[@gaganraja1050]

😂😂

[@somewagyuenjoyer]

ah

[@grimgamer24]

My mind is blown. I never knew you could swing more than one ball at a time. My life is a lie. 😭😭😭

[@leonardmaculo3864]

lol

[@luigigonzalez5062]

I always swing 2 balls every time I walk 😁

[@anishnehete]

@Epic loool

[@lawrencewei3583]

Really?

[@dainielmaldo7624]

What was the ball made of?

[@VinceTibo]

The shockwave explanation is brilliant, I always wondered how the system "knew" how many balls to propel!!! Amazing video once more! 👌

[@katjai0710]

"it has five balls" Me: I think you should get that checked

[@gamerhatch9072]

Am I missing some sort of joke? I don’t get it.

[@philliambillingsworth7806]

@@gamerhatch9072 you’re only supposed to have two

[@gamerhatch9072]

@@philliambillingsworth7806 oh, that’s what he meant.....

[@veganmeatball5276]

I have foure balls If you include my eyeballs

[@Oven653]

I has 6

[@MutantGummyBear]

Another reason it doesn’t go forever is because some kinetic energy Is converted to other types of energy. For example, each time some energy is being converted from kinetic to sound energy. Some thermal energy might be made as well

[@fish_in_distress]

5:25 he says exactly this 😅

[@ayeshamerrydeath7501]

Im not a very smart guy but I think he put it in a vacuum to reduce the energy loss in the form of heat. And the extra energy would make it swing longer.

[@abcxyz-]

But he said wrongly about velocity getting half If that happened by mv² logic, momentum will get 1/4th.

[@siddhantjhaveri]

@Partei Samte sound is produced. It just can't propogate without a medium.

[@OriginalSuschi]

@@abcxyz- momentum m*v, kinetic energy is m*v^2 /2

[@lukasaoo88]

Action Lab: “Because m*V=2*m*1/2*V=m*V” Me: “Ooooh ok i get it now”

[@prathyushsingh3991]

Understood! Lol! Ha ha ha

[@5-HeTe]

Action Lab: “Because m*V=2*m*1/2*V=m*V” Me: "And potato is tomato right?"

[@tswellersalzer1850]

The equation is unquestionable correct.

[@Ali-qo4si]

Its simple your dum

[@Bentadeo]

? I’m 10

[@motab9981]

Even if it does go on forever, you would never know

[@mricyhot7465]

MY MIND IS BLOWN

[@abdullahtheaa]

Mr big brain time

[@lukabalta2398]

i hate you i cant stand tought i wont be able to see something after someone said it :'(

[@Jankeza]

@maul because you would die before it stops and because its infinite you wouldnt know when it would stop

[@harryferrett9420]

maul because you won’t live forever

[@gronblom]

As some have stated, the force of gravity pulling down constantly seems like it would play a big role in slowing the balls down. However, this is not the case. When the ball is going up, gravity slows it down until its apex, but then gravity speeds it up at the SAME RATE on its way back down. Toss a ball in the air and it returns at the SAME speed due to this principle.

[@misterexclusive8282]

If gravity slowing the balls down is the consensual belief of the comment section, then I fear for humanity.

[@misterexclusive8282]

@True WingChun gravity is a downward force, so if you have something blocking an objects trajectory downward, then yes, it will slow down. But if there isnt an opposing force, the object will continue to gain speed until it reaches terminal velocity. The only time gravity slows an object is when an object has been moving faster than its terminal velocity in space, and when it enters earths atmosphere, it decelerates to its terminal velocity. However, this is not due to gravity, but to opposing forces *of* gravity.

[@bennemann]

Actually, because of a phenomenon called the terminal velocity of free fall due to air friction, if you shoot a projectile upwards very fast, when it comes back and hits the ground, it will NOT have the same speed as when it left the gun muzzle, because air resistance will impose a hard limit on the maximum speed attained by the bullet. Your assertion is only true for objects going upwards at **low** speeds.

[@dangolfishin]

@@misterexclusive8282 Terminal Velocity?

[@misterexclusive8282]

@@dangolfishin thank you

[@spirit3949]

If i got a quarter every time he blinked, i would be richer than Bill Gates.

[@imgonnatellmom3245]

My man living in 60BPS

[@CheckIt0]

Lol if u got a penny every time he blinked you’ll still be richer than bill gates

[@anklihlaanlestrange4881]

Now i can't unsee it

[@koaruu]

Wait, why does everyone hate him?

[@kdog5003]

@@koaruu no it was just a joke because he blinked alot in this video lol

[@manuelb__r]

That explanation of how it works is perfect. I've wondered it during my whole high school and only understood it now. I love this channel

[@nerdexproject]

Tmw when you believe you know how something works but then The Action Lab proves you wrong! Thank you man, I learn something everytime I watch your videos! Your experiments are hands-on and very interesting! You are the best!

[@pandaa5310]

nerdexproject I

[@clownchecked8155]

Now put a vacuum chamber in a Newton's cradle

[@billcipher3907]

Ariana Grande Illuminati

[@ch3ragCS]

Universe.exe has stopped working

[@randomdude3557]

Logic.exe not found. Please try again

[@brent_peterson]

Newtons cradle but instead of metal balls, he uses vacuum chambers

[@shane9245]

common sense.exe was not found. Error 28H82 Trying Again

[@yestermorrow3223]

Where the Heck did you get a vacuum chamber?!

[@joeybarela363]

amazon

[@Steam_User_]

eBaY

[@papyrusthecool8321]

eBay

[@mr_kos287]

Hes acctually Luka Maggnota, the cat vacuumer!

[@Binglechange]

he probably made it himself

[@thanosp.8140]

You are right about the shockwave but the energy loss isn't just from the string friction but from the fact the cradle doesn't have perfect geometry and the shockwave isn't directed precisely through each ball's center of mass. So each shockwave loses a portion that depends on the angle that the shockwave travels and the horizontal field where the centers of masses rest.

[@northernsnow6982]

It's also lost from gravity. If there actually were no gravity, then the cradle wouldn't have worked in the first place.

[@thanosp.8140]

@@northernsnow6982 This statement contradicts itself. It's not gravity that causes it to gradually stop, exactly because gravity is what sets this contraption in motion. Unless of course you're being sarcastic, in which case the cradle itself is also the cause since without the cradle there would be no stopping it either.

[@northernsnow6982]

@@thanosp.8140 no contradiction at all, gravity is always pulling down. Which is why the ball always stops at it closest point in the swing, to the nearest source of gravitational pull. Pendulums. Gravity. Yay. Otherwise when he let go, nothing would happen. Newtons law of gravity! Yay! Demonstrated by Newtons cradle! One in the same! Yay!

[@northernsnow6982]

@@thanosp.8140 do you finally understand that gravity is always going to pull down on any pendulum, and it will eventually stop at the point in the swing that is closest to the gravitational source? Or are you still duped by the fancy man, with the fancy words, in this baffling video?

[@northernsnow6982]

That's how plumb bobs work, and have worked for thousands of years. Bahaha 🙄 👏

[@marksimpson2321]

Great clip..really interesting to learn that air resistance is not what contributes most to the balls stopping. I predicted they would take twice as long to stop in a vacuum..

[@wecontrolthevideo]

Another interesting experiment is to lift one ball high on one side, and halfway up on the other side. Release them simultaneously and the higher and lower balls will alternate on each swing.

[@glitch-ify]

1:46 When you have no idea what he's talking about but you still say yes

[@Luxx1G]

Ok

[@Luxx1G]

Ok

[@Luxx1G]

Ok

[@Luxx1G]

Ok

[@Luxx1G]

Ok

[@rafe4784]

Action Lab! Action Lab! Action Lab! Just wanna thank you for your amazing videos. You help me out a lot with science and you're absolutely better than any of my science teachers. Keep doing this great work. If you remember me, I'm early again.....

[@ghostofsparta5100]

RoboRafe Hey,Im the one who started this thing!You people just decided to steal it from Me 😂😂

[@ghostofsparta5100]

A Akd Ahhhh,I'd better escape!

[@TechSupportDave]

@@ghostofsparta5100 lol if you actually are, then why are you surprised. I initially created a copypasta that became very popular, it was me just joking about a shitty channel offending its viewers and people started copying comment lol.

[@ghostofsparta5100]

MyOpinionIsAFACT Lol.And let me guess you're talking about a youtuber called "Jevilz" right?

[@TechSupportDave]

@@ghostofsparta5100 it does sound familiar. Only reason i dont remember i think is because i only realised some years after. Before that there wasnt a reason for me to remember the guy. Edit: so i only knew that the thing that became popular was something i made. Vaguely remembered where i sent it.

[@divine7460]

Real thing in this video starts from here 3:52

[@shinigami_akarshan]

Thankx for saving my time

[@sachinpatel9372]

Thank u

[@divine7460]

Its ok

[@internet_user975]

@@shinigami_akarshan no he's explaining the main thing

[@shinigami_akarshan]

@@internet_user975 ik

[@tpstrat14]

I watched like 20 videos so far. This is the first one I’ve seen where he overlayed math! It’s funny because math really is the language of physics and he doesn’t really ever speak it. I don’t blame him. No one here is actually trying to learn physics. I bet you he’s inspired a few people to learn it though! :)

[@kuwushh]

1:00 poor middle ball. Being bullied of all his friends😢

[@M-x67]

Lol bro

[@shaunn1669]

Loool

[@jjamm24]

lol-

[@boorave]

Lolol

[@1_3_37]

Lol

[@midnightthoughts8519]

Thank god I listened to my teacher in Physical Science last year, or else I wouldn't understand 80% of what you said.

[@Sam.osborne__]

That's a really bad Newton's cradle

[@dustinmyeye8752]

Had to scroll way to far down to see a comment stating this very important fact. This is indeed a shitty Newton's cradle.

[@barrettbarker8343]

Enlighten us laymans...why is it a bad newton's cradle?

[@notplates]

Barrett Barker it doesn’t bump back and forth as long I think

[@barrettbarker8343]

Perhaps due to many experiments involving magnets? I like this channel. Thinking is good for brains.

[@tristangillis7365]

@@barrettbarker8343 Typically a Newton's cradle doesn't have that much play in the base structure, to begin. That alone "steals" a lot of the energy that would otherwise go in to continuing the pendulum motion.

[@skrimish7145]

when i was younger i was played with this amazing invention then my dad came and said stop playng with newtons balls.

[@eklhaft4531]

Poor deceased Sir Isaac Newton. Were you playing with his strangely well conserved soft tissues?

[@signlanguage4241]

@@eklhaft4531 I’m commenting on this comment you made. Please, this is horrifying, delete it.

[@soyjakchud]

@@eklhaft4531 Wtf

[@KingJuulien261]

@@eklhaft4531 uh

[@emotionalstyle2731]

The shock wave explanation is beautiful!

[@makeusing4256]

Another great vid you really help understanding scientific concepts love all your vids keep up the good work!!! Edit: OMG thank you.

[@konversion]

Is that cradle magnetized? It looks like the balls were sticking together at the beginning.

[@Ultraice98]

You can see it separate when he sends 2 -4 balls

[@melcosta92]

I noticed that too and found it a little weird..

[@drago7410]

Must be iron?

[@alanjenkins1508]

Probably the reason all balls quickly end up swinging together.

[@lekobiashvili945]

He uses a magnet to hold the ball before the experiment, so one can assume that the balls are slightly magnetized. This will also play a role to eating up the initial energy though.

[@LaGhosty]

2:40 listen closely

[@_________________6967]

??? What did he say

[@LaGhosty]

The BALLS

[@arjunnnnnnnn]

Ayooo 💀💀

[@LaGhosty]

@@arjunnnnnnnn This is such an old comment, and i dont know why i said it

[@beniaminsevera3160]

I remember that like 5 months ago in plysics class my teacher show us the Newton's cradle and after she showed us what it does she asked us why it stopped and I said that energy is gived to the string but theacher said NO and after that she told us that it stopped because of air friction . So Me after watching this video: -_-

[@dogwalker666]

There is a little thing called gravity.

[@AlphaKHILADI]

@@dogwalker666 yep and it's present in all over the universe

[@dogwalker666]

@@AlphaKHILADI indeed it is.

[@creativenametxt2960]

And it also isn't what stops it, funnily enough.

[@daven6910]

@@dogwalker666 Indeed there is, despite attempts by some to show that an egg can prove otherwise! he he! I'm off to have a riley.

[@nadian848]

I’m just heard to watch the Newton’s Cradle work. It’s satisfying.

[@hamburgerlol4065]

Hey The Action Lab! First of all I love your videos! Second I have a question, I know that sound needs a medium to travel, but what happens to the generated soundwaves in the vacuum chamber of the Newton's Cradle? Where do they go? Thanks!

[@beenay18]

Maybe there is sound but it does not travel because there is no medium. By sound i mean vibration. The vibration in the balls would not transmit to air. So that our ear wont sense it.

[@lnewlf5951]

They are just converted into another form of energy, for instance, thermal energy.

[@placeandthink8728]

yeah, the balls probably convert a little motion into heat when they compress/expand elastically. The heat then escapes from the balls as infrared light, into the air once the vacuum is released, even a tiny bit into the wires also: it's not a perfect vacuum. In fact, neither is space! Very low frequency sound waves can travel with very few particles present. The metal balls knocking against each other probably don't produce that kinda sound though, it's more like astronomical events and stuff that can make such sounds

[@harklev1713]

Sir, all you said goes through my head

[@coolmate5459]

This is how many times he said ball 👇

[@alexesmttrs]

cool jack you failed

[@anuj8825]

This had 68 likes and I made it 69 .

[@Datmexican]

It’s still at 69 likes don’t like it

[@anuj8825]

@@Datmexican ; I MADE IT 69

[@Datmexican]

Who liked it?

[@rahilasuab1976]

Only KZbinr who has so many subs And makes a short, to the point video

[@aneecraft2350]

This is king of random but actually good.

[@anakinlowground5515]

King of Random used to be really entertaining, back when Grant Thompson ran it... It's a shame he passed away.

[@Classyangelic]

Awesome! I’ve already done the experiments from my subscription box!

[@pikachu.1569]

Action lab Action lab Action lab It worked....

[@ghostofsparta5100]

pika chu. I cant believe people just stole it from me lmao..

[@pikachu.1569]

@@ghostofsparta5100 ....

[@nightmarex8111]

Ghost Of Sparta i cant even see your comment anywhere

[@ghostofsparta5100]

Nightmarex Its not in this video.Its in the "What you call a place thats no where and everywhere" thing..You'll see it there,thats the comment that started it all.

[@ghostofsparta5100]

pika chu. Hm?You dont believe Me?

[@karthikrkashyap3915]

Love your videos dude. helps a lot to view science through an amazing perspective.

[@ABCDuwachui]

Karthik R Kashyap hey sexy

[@confuseddog134]

I never understand a word he says yet I still enjoy his videos

[@ducki8435]

Every time I wacth your videos I learn something so I subscribed

[@MammaOVlogs]

loved it and now l want one of those! :)

[@spadeney3722]

1:08 if you get bully in school and the bullies toss you around (your the one in the middle)

[@robloccnmeme969]

I will like this because no one else will Edit: wow this got 3 likes you don't need to like it

[@gabor6259]

All around me are familiar faces...

[@shobhitjohri2304]

Now its 4

[@anawfulperson]

Aqua World now its 19

[@UnknownPerson-nl7te]

K as ur wish,I disliked the comment..XD

[@carltonxcarlton]

😱😱😱 kzbin.info/www/bejne/lWnRe5ibjcaFg9U

[@jiaolin693]

there is always something new that can learn from your video

[@Aristothink]

WOW, great experiment. One of THE best of its kind. Indeed, drag can't play much of a role since speeds are very small....Very visual your experiment...I will never forget this experiment.

[@yuvalshah2441]

1:17 me waiting for 5 ball 😂

[@weemsart]

He must be a science student He is very good in science Great videos It helps us to learn more

[@Go-DUsopp]

Lmao he had worked in NASA for 1 year

[@cordoot9420]

Just subbed, love your vids!

[@JeevanSamagar]

🔥🔥🔥 These fires came while listening 🎧.......

[@theoriginaldonutdude4950]

This is my favorite channel in 2020

[@buttercowlord1858]

Nice video good job I subbed

[@Goldslate73]

I always get my mind blown and eyes opened when I watch your content. You're awesome.

[@peppacapi9183]

LOGIC: Tells what he does today Main part of Videó Explaining how it works Great

[@amitabhanand12]

Congratulations for 3 millions subs🥳🥳🥳🥳🥳🥳

[@boyfriendfnf5142]

The editor:*shows"Because:m*V=2*m*1/2*V=m*V Me:[Confused Screaming]

[@musicisthefoodofthesoul]

I think it's the momentum equality(total weight x speed) of 1 ball which weighs "m" grams with V speed and 2 balls with "2 m" grams and has V/2 speed🤔

[@nativedog4209]

@@musicisthefoodofthesoul huh?

[@ShaanGNas]

My question is, what if you release the 2 end balls at the same time? My prediction is, they bounce in unison away from the 3 center balls.

[@estebson]

They do!

[@elepunto.]

Check the end of the video where he does it

[@andrewk6411]

Notification squad where you at?

[@sorrythatusernameistakenpi8739]

Here

[@bombgazzi2995]

Here

[@Snailiens]

The comments

[@HighlanderFrag4Life]

oy

[@gabor6259]

It's not the notification squad, it's the "I'm gonna write out TheActionLab 3 times because I need a heart because my life is totally pointless and without TAL's heart I feel like a useless piece of sh!t" squad.

[@ophiolatreia93]

I deleted my comment so you would know how i got so many likes

[@llhs-flamez6115]

not really anybody couldve thought of that

[@ophiolatreia93]

LLHS-FlameZ but you didn't.

[@CRAZY_DI_DRAGON]

Lol

[@ImplyDoods]

@@llhs-flamez6115 and anybody could have fought of a lot of things like your username

[@PramodKarthikeyan]

Toasted

[@hmw6237]

Fascinating. My only real additional thought is to wonder if using the magnet imparted some residual magnetism to the ball that caused it to "stick" a little to the first ball that it hit which would slow things down.

[@mimcduffee86]

Unless you use a magnetic diode, the magnetic field of the magnet can only be extended. It can't be transferred.

[@FURY-bc6cj]

Nice explanation. Love from India

[@Simon-oy7kf]

Did people really ask you this? I think it's pretty obvious that most of the energy is wasted in the momentum and impact of the balls and not the freaking aerodynamic drag

[@m81895]

you would be suprised how little the average person knows of physics.

[@connervice8252]

mark is right, some people just don't know things or didn't pay attention in middle school

[@bubbleslovely129]

oh hi mark

[@Yusuke_Denton]

Same here. I've never heard that friction or drag is what causes these to stop, and if you're completely ignorant about physics, you wouldn't even consider that.

[@mahela1993]

What about the energy lost as sound after each impact? Would putting it in a vacuum eliminate this loss?

[@Justin-nq3lq]

There is a light hanging from the sealing at mijers it has been swinging back and fourth for the past five years this is very strange

[@charlie_mario6292]

*_VIDEO QUALITY 100_*

[@infonan]

What a youtube channel !! Thanks bro for doing all this experiments .💓💓

[@dushyantmukadam3176]

Well explained brother Thanks for your work

[@Nothing-od2ot]

Can I get a heart for effort? Edit:I feel accomplished

[@Jacob-fl7zp]

Your Nothing to me :)

[@thanos4893]

@@Jacob-fl7zp lol puns

[@stemg-gillegoarjadel.113]

80's Said We Will Have Flying Cars In The Future. And Here, We Swing 5 Balls.

[@challengesawake7788]

Newton's cradle was invented a long time ago

[@johnrubensaragi4125]

That is called learning

[@obi-wankenobi916]

Woahhhhhh

[@llhs-flamez6115]

@@obi-wankenobi916 hello there

[@praneelmajumdar472]

If u wanna post an overused comment ,then atleast post a decent one

[@Not_Sure_2505]

Motion loss through frictional heat is one aspect yes, but these masses are also heavily influenced by gravity (force) which slows the motion down as they want to be closer to the earth (straight down).. in simple terms.

[@channeldoesnotexist]

That is incorrect.

[@Not_Sure_2505]

@@channeldoesnotexist please expand my man. It's cool to say I'm incorrect and I'm open to your view

[@will.ecrowe2090]

This guy helped me a lot with my physics homework

[@JaxxGaming7997]

Action your my favorite KZbinr learn something every day❤️❤️❤️❤️

[@williamhenry4380]

If someone invented the infinite machine, he/she would become an ultimate scientist

[@Sciguy95]

If you're talking about a perpetual motion device then we already know it's not possible. Every system has a small amount of energy loss due to things like friction and heat generation which eventually causes the system to slow to a stop. And even if you did succeed it would be useless because any method used to generate electricity would be an energy drain on the system causing it to slow to an eventual stop.

[@myyogaandfitness1630]

@@Sciguy95 oh nice information but I will invent something and become some thing like a famous person and then you will take my name on gk book so I will do that and thx brother for information

[@thefortnitecuh4900]

you mean perpetual motion

[@williamhenry4380]

Yes I'm talking about perpetual motion

[@rickperez8044]

"It knows." I think you may have found the key to the physics of consciousness. LOL

[@arshkhan6918]

He did the experiment on 4:14

[@rizwanyunusphysics5566]

Beautifully explained Sir

[@rickintexas1584]

Very cool. I learned way more about a Newton’s Cradle than I ever thought I would.

[@androixxxx]

Actually the difference is not negligible almost 3 sec from 11 to 14 seconds wich is a gain of more than 30%

[@gronblom]

That may be due do not having any loss due to sound, since there is no air for the sound to move in, thus no energy is lost by sound energy. Air friction IS NEGLIGIBLE with the small size, slow speed, and aerodynamic shape of the balls.

[@m81895]

3 seconds is negligible compared to the infinite time it would keep going if there was no energy loss in the form of sound and heat.

[@xenonram]

A gain of MORE than 30%, huh? (Gain of 27%)

[@nathanh775]

Not 11-14. 11.96-14 00.04 away from 12, you round up.

[@MrBrew4321]

I was thinking about it before viewing the result and predicted three or four hundred percent gain. 30% was disappointment :/ … I figured the heating of the string would be negligible and the air resistance would be super low, but less negligible - hence not and indefinite swinging. In retrospect I can see how the vibrations could carry through the strings -> supporting bars -> to the base and then out the chamber.

[@userBBB]

what does it mean to have energy lost to entropy?

[@thehexpro2429]

Can you explain the science behind charcoal on teeth or the gel with UV rays on teeth to make them white

[@masonfio33]

Do that action lab!!!

[@m81895]

Im far from an expert in the area, so take everything with a grain of salt. From a quick search ive found that UV rays have been proven to not help whiten the teeth and is more likely too cause damage to teeth, lips and gums including increased change of cancer in those areas. so stay away from UV. There are no scientific studies showing evidence that charcoal help whiten the teeth either, although it has neither been proven to not work. if you want to whiten your teeth i suggest looking into other things which are supported by scientific studies.

[@benjaminswartley1803]

@@m81895 Charcoal is used in toothpaste and such as it is good at removing stains. There is value in it's use in those substances.

[@m81895]

@@benjaminswartley1803 yes i saw that when i read about it and people claiming it to remove stains. im just saying there isnt any scientific studies which shows evidence that charcoal actually help remove stains. And i dont take what people say for truth, after all there are still dentists providing UV treatments despite it having been proven to not help whiten teeth.

[@boomjonggol5757]

I watched in another Action Lab video that charcoal is actually a very fine abrasive. So.. other than the bacteria, you're scraping teeth off too, generally speaking.

[@simon-ze7kq]

oh my God at 1:57 I got a notification from this channel Scoop with the title starting in "*Visible Confusion*"

[@MeHighLo]

You are the "back and forth and back and forth" man!!!

[@cheese9144]

3:10 oh shit i guessed it right

[@jyotirmayamallick9993]

My mind-because of vacuum the oscillation will be forever. Friction-hold my ability

[@BharathinfinityHegde]

Well a more simple way to explain the reason why only 1 ball swings instead of say 2 with half the velocity or three with a third of the velocity is because then the kinetic energy wouldn't be conserved. The collision of the balls is nearly elastic as you pointed out, the kinetic energy must be conserved. If the incoming ball (mass m) collided with a velocity of v then it would have a kinetic energy of (½ . m . v²) If suppose there were 2 outgoing balls with half the velocity the total kinetic energy of theirs would be ½ .m. ( v²/4 ) + ½ .m. ( v²/4 ) = ½ .m. ( v²/2) This would mean the kinetic energy is not conserved. The shockwave reasoning is not satisfactory as telling that a system "knows" what to do is a non scientific explanation. Besides you talked nothing about what the shockwave even is.

[@harryvenderveer8116]

Am I supposed to understand this when I haven't go to college or university?

[@rajchoudhary4349]

Nice narration..!!

[@naseemmanniyil4066]

It would be easier if I found this video when I needed it!

[@eliseenerson7701]

My first thought: dollar store Dr.mike

[@gaq1514]

*CONTENT* 90% Explanation how a cradle works. 10% Experiment

[@ginismoja2459]

True but can't complain

[@choppership465]

*TITLE* 10% Explanation how a cradle works 90% Experiment

[@catgirlQueer]

My predictions before finishing the video: friction heat will slowly drag away energy

[@charlizoh2319]

everytime I watch action lab ,I feel an urge to get a vacuum chamber

[@Zygentome2]

My guess is that gravity will try to keep the ones that weren't raised, down but the force of dropping the ball that was will move the one/ones with least resistance.

[@uxubuxu]

From my 7 yr old son: I'm so amazed that in the box with no air can hold up to 14 secs

[@SelectaVAL]

*What about 5 balls?*

[@satvikp3186]

Do you remember this comment?

[@hangingoutwithhuck8344]

3:42 is when the actual vacuum chamber part starts. you can thank me later

[@shadowclones4669]

Thanks

[@TheProGam3rHD]

Ok, I'll thank you later.

[@febiarfini9128]

So satisfying! :D

[@anakinlowground5515]

Well, it isn't foor me because i thought it lasted for minutes or hours at a time because of shows. They lied to me.

[@randomvideos5820]

Ok nice work man