Magic Rollback Can - Sick Science!

[TheBadgerElite]

@ajreukgjdi well done have a cookie!!

[nicolhaidi]

It's because it's battery powered, duh!

[TheLozfan123]

Magic *snort* *snort*

[superherode]

i hate the song

[MYFAMMLY10]

cool as hell

[Spazman100]

Soo... why do I have to use a battery?

[anxez]

@Spazman100 You don't have too, you could use any little heavy rectangular prism, so long as it would hang down and not spin with the rubber band in the center. But a battery is common and it suits this purpose pretty perfectly.

Plus it gets twelve year olds arguing over whether it needs electricity or not. And that's always a good thing.

[thesuperdjmorgan]

@Spazman100 As a weight.

[dottieequalsawesome]

the battery makes the rubberband wind up, so when the rubberband unwinds it makes the can roll in the opposite direction.

[HalmatVevo]

It wont roll back which sucks ALOT!!!!!!!!an it's due in 3 day :( ugghhhhhhhhhhhhh

[GamesAndMoar]

Why can't you be my science class teacher?

[meapy1]

Looks exactly like a normal can...

[Iggygirl22]

i can see some lonely little kid with no friends playing with this and insisting that his imaginary friend was rolling it back.

[TheJiggily]

what if you roll it down a hill? didn't think of that, did ya

[supersalty22]

gravity

[StivenAliaj]

this channel is cool...

[Rs2thegames]

When it required a 9 volt battery I was really interested thought its going be something magnetic or electric. Then I was disappointed , but at the and the can came back :)

[mrgamerdude22]

this is how you keep a blond busy

[quantumbrewer]

given a longer video, the can should oscillate over the tabletop

[ezodrag]

I sick and tired of not having any supplies in any videos. You know what, I'm asking for supplies for my b-day

[TehParanoil]

Darn you Steve Spangler, I wanted to get to bed 2 hours ago!!

[MsStarbaby22]

its goes and the rubber band twirls then it has to untwirl!!!

[Kaeleido]

Lol when it said 9v battery I thought it had something to do with electricity.

[Epicvideos333]

A simple way to prevent the can from running away!

[TheLozfan123]

WHAT IS THIS SORCERY!?

[divinedichotomy]

This looks like a Mac ad :)

[dania2008]

forever alone's favorite game!

[skipp311]

Witchcraft!

[SuperPoketown]

it acts like a brake and when it cant hold it anymore it goes back. ( oh and will this work against gravity like a hill?)

[cweida111]

@SuperPoketown at one point it should just stop on the hill when the force of the band is equal with gravity.

[kwezzyful]

what if i roll it off a cliff should it come back to me

[lazerqueen88]

its because of the weight of the battery hanging inside the can

by pushing the can the battery follows and swings back making the can return when it slows down from the push.

[xocutexo123]

I've only just figured that the red letters spell science XD

[moviesbyelly]

I know how this works: when you roll the can the rubber band twists itself inside the can (because it's attached to the can when you roll it) and unravels when it slows down thus rolling backwards.

[JACKDEC11]

it probily the ball is going side to side so it makes it move because i done it before and thats how i done it

[narutoxpein98]

in soviet russia can rolls u

[Rekitanas]

What sorcery is this?!

[NEWvespabros]

1) tape two together

2) roll it

3)????

4) PROFIT

[HeyItsTyler2000]

I remember this on a ill nye :)

[AllAboutTheBrawl]

Had This Tune Stuck In My Head All Day >.> lol But I Enjoy These Vids :)

[sunyrocks777]

torque



[idiotAREstupid]

Why batteries? You can use any weight!

[jsmykal]

@idiotAREstupid I think it's a play on the battery storing a different kind of energy :)

[narutoto6]

the weight of the 9volt battery causes the can to move back

[luigishotu]

gravity is the answer, again

[luigishotu]

this is because of "inertia". The battery doesnt want to move and so will taught the elastic inside the can, forcing it to roll back :)

[nevaldry111]

Because the can loves you?

[TheVinegaroon]

@nevaldry111 nah!just wants ur cookie!

[thelonnerforever]

@nevaldry111 thats the best ive ever seen out of the commets

[animalgirl535]

the wate of the battery cuase the rubber band to twist and wen it un twisted the force cuse the can the turn i no that an im 10

[lisapurple89]

yeah water bottle works to

[PieNPandas]

The battery makes the rubber bands spin and have too much tension so It rolls back

[videoman5747]

How is this sick science???

[DeathDarkness5000]

you can roll it with just a empty can, by holding the top and making it slide backwards...

[Stephenplaysmusic]

you can also do this by drinking half a bottle of water and rolling it, it comes back to you.

[JackRabbit894]

When you roll the can, the weight of the battery holds the middle of the rubber band in the starting position, causing both ends to twist as the ends of the can rotate. The rolling back is simply the cause of the rubber band straightening itself back out.

[wey150da]

but if you roll it too fast, it won't work :(

[SuperMitchTV]

Forever alone

[Kreepeuromg1o0fat]

@SuperMitchTV OMG HAHAHAHAHAHAHA 

[ajreukgjdi]

the battery is heavy enough to stay in the same position, so the rubber band has to wind up to counter-act this. the rubber band wants to return to normal position, but to do so, it mus unwind the opposite way. you add kinetic energy to it, which then converts into potential energy in the rubber band, and then back to kinetic energy in the opposite direction

[iFilmmak3r]

@ajreukgjdi You took the words right out of me. LOL ahahhaha jk, I'm too stupid for that. :D

[videogamergirl123]

@ajreukgjdi Amen

[MegaDarkgunz]

@ajreukgjdi waaaaaaa????????

[austincbacon]

@ajreukgjdi momentum not force my friend

[TheeGoldenOreo]

@ajreukgjdi wow dude you are way off

[chocolate4948]

Oh my gosh! I did this last year in science lol

[1shanespencer]

static electricity



[emilya321cprocks]

I still remember I made this before... It was amazing!!! I just don't get how this works however... Hmm...

[skitique78]

If you roll the can too far it kind of goes into convulsions and does not come back.

[superAl823]

Wow

[Cobra91Serbia]

Heh, nice one. :)

[khoi98]

I hurted my hand when doing this

[SuperSlimeBoy]

I need your help for halloween i am going to buy some halloween stuff of your site, and need to know, i JUST want glow powder, i am buying the large black light, so is the glow powder jar ONLY glow powder?

(respond or i will not purchase anything.)

[Cantrell2500HD]

who cares

[Flatpotion]

when i saw this i was like: okay now holy shit how did he do that?

[Jdtoolbox]

Hi im really interested in this vid... but the thing is that I dont have a bettery... can we use something else? thanks... please reply.

[19zebra19]

@Jdtoolbox cause i knwo how it workds so just use something bout the same size and weight :)

[YouGotPwnd]

@Jdtoolbox

of course. anything heavy

[claytopia123]

wheres the do de do dee song??

[claytopia123]

wheres the do de dod de song???

[samanator93]

What a waste of a battery... unless the battery was wasted already. AHH HHHAAA!

[AshtonPhillip]

this one was actually kool

[kiekert2007]

choice.. the can has the choice and the ability to reverse it's roll.

[maty157700]

In the next video could u teach us how to make a cotton candy machine!!!!!!! Please

[DontReadMySpam]

I was wondering what was the 9v battery was for?

[KrazyAwesomeful]

We did this in fifth grade but it was a little different because we used a film canister and a pencil!!!

[islandfireballkill]

comment waiting for approval :(

[TheSkd123]

AREYOUAWIZARD.JPG

[sidhus4life]

I have the same screw driver... i'm cool.

[kvilao]

steve your science is always amazing wether it's explosions or title tricks its still amazing

[kernelle4]

You don't need a battery you can just use something heavy.

[kiminokami]

@kernelle4 You need a battery to show that you are doing SCIENCE!

[Shurick92]

Sick ?!

[khoi98]

BIG BANG! Once Did this... It's too old so I don't remember the episode of Big Bang showed this...

[Andreorigamilover]

the battery's weight is heavy so when you roll it, the battery stays in place while the rubberband is twisting and if it untwists, it will roll back to you. pls correct me when im wrong

[88robi88]

Easy: conservazione del momento angolare!

[MsReborn88]

u can also replace the can with a plastic bottle

[annie123abcteehee]

LET US SEE THE GUYS' FACE ALREADY!

[michaelheartsBOOBIES]

honestly, i sometimes watch these videos for the music. HAHAHAHA

[TheUfonautas]

Magic.

[photolabguy]

I saw this on Mr. Wizards world 25 years ago. :-)

[Stevespanglerscience]

@photolabguy Mr. Wizard was and still is an inspiration to our company!

[gigsters42]

At least that's what I think. I didn't try it but that's my guess.

[gigsters42]

It works because the battery is heavy and while the can is spinning the rubber band is bieing twisted because the weicht of the batterey is bieing held in place. So the rubber band twists up and has to untwist. So the can rolls back from the force and... vuala!

[phlippinout]

That was a trained can

[Theeylovekim]

do this for what? So a can, can roll back to you.....

[RolingStone10]

we built this at my elementry school. we would move it a circular motion, put them on the ground, then race with them

[KyleLee408]

Would this work on a slope down? >.>

[lilacgurl]

Ahh, I made this in primary school!

Good times.

[jediboy96]

Wait... so when you say "magic rollback can" you do not mean it's a discounted package of beans?

[in2universe]

OMG HOW DOES HE DO THAT?

[sweetietweety99]

I wish u could cum to my skool and do like a cool science experiment :)

[collectorx1000]

can you use any battery

[collectorx1000]

can you use any battery or what

[yondaime500]

It will not only come back to you, but oscillate around its starting point, like a pendulum, right? Doesn't look like it would go on for a long time though.

[XxHarounXx]

Do try this @ home with mr g.

[Randoman41]

Would that work with a Oil Drum and Lantern Battery

[jedisponge16]

Roll it down a hill

[zimbabweian]

elastic potential ftw

[rice4asians]

what is the purpose of this?

[ChikoWhat]

@rice4asians

That is science that isn't dangerous and you can do it at home, problem?

[percivalbuncab]

@rice4asians for fun

[OblongSausage]

I saw this on Do Try This at Home with Mr. G 3 years ago.

[Stevespanglerscience]

@OblongSausage that's awesome!

[TheMagicGog]

@Stevespanglerscience I hate you but I like your videos!

[12kasper21]

@OblongSausage me too lol

[spooky1000]

Batteries are dangerous and little children must not be allowed near them. I made this kind of toy when I was little with a big steel nut and it works just fine.

[jocax188723]

@spooky1000 Big steel nuts are dangerous and little children must not be allowed near them. They look nondescript and might be swallowed.

[superfunny1972]

that's actualy a great demonstration of storing kynetick energy into potential and the other way around(sry for my english)

[adadaryll123]

@superfunny1972 Your english is fine... I didn't even notice you weren't english. Compliment!

[Ninjapcx]

this should be the opposite of the children's toy cars that you drag them and then let them go running for a while :p

[earlydragon3]

i did that in one of my science classes once i failed at it tough

[superLPbros1]

That works with water as well. A lot simpler and is more of a demonstration of inertia.

[99moneylover]

u can use a washer insted of the battery and tape

[961kgb]

basic "action-reaction" principle.. can work with any weight but u can't push the can too far: at some point the weight is going to flip and nullify some of the effect

[yondaime500]

@961kgb calculating how hard you can push it would make a nice physics problem. If only I were a teacher...

[Cooloakz]

Is it not the elastic band being twisted and it uncoiling on the way back

[WakingLife55]

Now I wont lose my empty cans, THANK YOU!

[cartilige]

Would a stone or metal bolt not be safer than a battery and easier to use? I know we dispose of spent batteries immediately for ease so I'd either have to wait till I had a spent one (for 9V not regularly) or use a new one, also a lot of people use rechargeables now.

[nikogior]

I thought it was not going to need batteries! Oh f**k!

[MrComputerFreak99]

Nice!

No idea...

[MrPiopiospy23]

Interesting!! Keep going like that

[noobcloud]

so it works like this: when you roll it the weight inside of it (the battery) stays in the same place, winding up the elastic and the elasitic wants to reverse and releve tention, so it unwinds, making itself go backwards. am i right, because im not sure...

[15peters]

@noobcloud u r right u beat me to it 7 min ago

[theclashrock09]

@noobcloud I don't think anyone needs an explanation, especially if the battery and the elastic is visible through the translucent lid, I am sure that reason alone is enough to make people realise. Well unless they are retarded.

[diablostorm]

@noobcloud Yep, and the battery could just very well be a rock instead.

[bastiloetje]

@noobcloud I was wondering, but your solution makes sence. You're right ;-)

[aeroscope]

@noobcloud you are right but not with correct terminology.

[shourieram]

@noobcloud you are right.. it does make sense.. :)

[godl1k3Production]

last!

[elizzhu]

interesting interesting

[themaskedcrusader]

good demonstration of conservation of energy. Has kinetic energy being transferred into potential energy and back to kinetic energy again. (I bet the battery is just for convenience. It should work with any heavy object, such as large washers, bolts or gold bars.)

[eeveelover1121]

kool

[IAmTheFarmer]

cool

[Ace011mm]

Rubber band twisted and do like a spring.Battery hold rubber band fixed in the middle independently of the can...spring make force...

[mylilhope06]

The rubber band twisting and untwisting rolls it I think.

[kangarooslam69]

nice vid!

[trashcan1112]

the battery acts like a weight and twists the rubber band since both ends are tied at the ends. when it spins the rubber band spins also so eventually it wants to twists back and that causes the can to also go back =)

[mistaecco]

It is pretty hard, but using staples, AA batteries, a needle and thread (or even just a croshay hook), and a soda can, you can do this same thing and make your friends freak out when they see a possessed soda

[DinoWizNit]

How does this work?

[emerybryant]

27 years old and im clueless O.O

[SuperBaburu]

let there be light...

[legocreationmaster]

awesome

[naspargyu]

fun

[MrYankeeman999]

like if u never do any of these projects and u watch them for fun

[RunescapeVids351]

Nice!

[MrMusicLol]

Love your Video's(L)

[langeleipe]

or you could just roll it moving your hand down (not your arm), than moving it up and releasing it... mind giving a clearer explanation?

[mytomtom11]

steve there is only 1 thing to do with you... MAKE A WHOLE TELEVISION SERIES ABOUT YOUR EXPEIMENTS! science rules!

[robodevil11]

awesome

[robodevil11]

awesome and under 100

[Ledet90]

Hello:)



[akiv12801]

Hours of enjoyment for the simple-minded.

[checkthisout229]

cool

[SuperHddf]

lol sick bro

[SportsMusicGamesLife]

Steve, your a beast.