MIT Physics Demo -- No-Win Tug of War

[FoodTech41]

why no kiss?

[brodywx]

Are they reenacting the spaghetti scene from Lady and the Tramp?

[buioso]

WOW, prepare your dress suit for Stockholm!

[BakerTarabein]

gay.....

[RUDY2295]

Fuck you its fake

[arxidoforos]

What a romantic experiment

[ohitsmeoh]

I think it's trying to display application of force without translation.

[abborne1]

This would have been more instructive if one of them had not pulled at all, but just held fast. It also would have been more instructive if the rope had been long enough to actually show some movement, but as another commenter said, it's all fudged because you can't get the real world to behave like a simplified model.

[knockdoun]

groundbreaking science...

[ilovetails123]

sittin on trolleys and tugin rope... :/

[bgpivoter]

Does this mean I can graduate at MIT with flying colours? Because I can do this all day...

[D00mM4r1n3]

A gay video that only gets gayer at the end.

[ryanmerkle5]

the center of mass will change. if the right side was 400kg and the left was 40kg then the left side would move closer to the center than the right side. causing the center of mass to shift even further to the right.

[MyBadGamertag]

Why was this video downvoted so much?

[msbfd]

Like most physics demonstrations, they have to fudge it to make up for real-world things like friction and inertia that make the demonstrations not come out right. Notice that when they meet, the center of the rope is to the left of where it started.

[23noszz]

this would be better with 2 girls but nice experiment anyway

[abus777]

Ehh ; I'v seen it done with two dogs and a plate of spaghetti....

[Griesmayer]

96 people are homophobic retards, 45 are budding scientists

[jony1710]

i did this at high school?

[Boxhead6616]

they had to go to MIT to learn that?

[M1ST3RHYDE]

Wouldn't the faster stroke be the one that could over come the even pulling force?

Thats what looks to have happened.

Am I wrong or was this in a vacuum.

[spolida]

Ha!

[THEEEHAMMMERRR]

and this is why preet patel just committed to UPENN..

[joegt123]

...I guess this is the MIT version of that one stupid bitch that you're AMAZED made it to highschool...

[80CJ5]

Kind of looks like a Gay nerd version of " Lady and the Tramp" LOL

Is this what MIT is all about. I'm not impressed. Just kidding Ya'll. I just couldn't help myself with the smart assedness.

[UltimateAsian199]

I see how the lab coats benefited the experiment, keeping harmful chemicals out of human contact with the skin.

[mickycheese27]

THE MAIN IDEA IS TO PULL THE ROPE IN TUG OF WAR NOT GET CLOSER TO THE OTHER PERSON

[Voiderify]

"Hey baby, wanna play a game of tug of war where no one wins?"

[Roner101]

physics is an expression of love

[KIFulgore]

That's how physics guys get the girls ;).

[matttatts]

they should have kissed at the end

[maersklandro]

The chick on the left is obviously fattter.

[coryg1088]

doesnt this "no-win" battle depend on the weights of the people and the force they are pulling with, or is it the case that they will always end up exactly in the middle at the same time, seems unlikely to me but physics has fooled me before

[tonyjoo]

@coryg1088

I think so. The center of mass wouldn't be at the center of the two ropes if one person weighed more than the other, it would be closer to the person that is heavier. The way I think about this is that the heavier person has more inertia, a resistance to move, so the lighter person will move more than the heavier person. It also doesn't matter if one person pulls, or both pull at the same time, assuming the friction due to the wheels of each cart is the same.

[RobeonMew]

however if one holds and one pulls, what happenes?

Damn MIT are dumb people

[Surfister]

@RobeonMew They'd still meet in the center, i think

[RobeonMew]

@Surfister The inertia of the puller would have it not quite center, but closer to whom who used the pulling energy

[RoboDan10k]

I felt the passion between the young homos young and in love, not a care in the world just buttsex and rolly carts

[pumpbreaks]

WTF you little fucking bell end p[eiople like this ruin youtuibe!!!! fuck of and have a kiss

[metubegirl69er]

yall should have kissed at the end

[muchufoo]

this should be done on a much larger scale

[Makingnewnamesisdumb]

This is what MIT students pay $40,000 a year for.

[ion010101]

@Makingnewnamesisdumb I for one whole heartedly endorse the price they're paying and can assure you that it's all worth it. -MIT Chancellor

[nathancourse]

Am I missing something here? It seems that the center of mass is in the middle only if the masses on both ends are equal with equal resistance. Think of it this way, if you stretch a measuring tape out 10ft and put the "center of mass" at the 5ft mark, would you expect both ends to collapse at the center of the 10ft tape if you let it wind back up? I think the two guys here are similar enough in mass that it looks like the yellow center doesn't move, but it does. The center isn't quite accurate.

[wearashirt]

Did you see the smug on their faces? Haha.

[alphadus]

if the wheels on one of the the trolley was stiff now?

[Libertarianist]

How Lady and the Tramp-esque.

[Kiai1988]

Questo esperimento si poteva fare meglio... penso che la distanza doveva essere maggiore, per apprezzare meglio la differenza di accelerazione, dovuta alla differenza tra le 2 masse.

[skylinevq35]

So what was the velocity of both karts when they hit at the center? Knowone knows that. I do.

[HunterHM1489]

@quidproquo2004 I have to side with stalker7d7, because I, too, understood basic physics at such a young age. Many times in my life I have solved a complex conundrum due to a lack of knowledge only to discover later that had I just waited, I would have learned it in school.

But I do disagree with stalker7d7 on his statement that the information in this video is pre 1st grade, only because the majority of kids nowadays are stupid, and I honestly don't think they could understand this concept. No

[zenzebra1]

their on their hony moon

[AlienEngineer1]

THE ONE ON THE RIGHT LOOKS LIKE HE ENJOYED IT

[gunchibaiyya]

So this is what they do with all that grant and funding at MIT!! Cool.

[AlansVlogs]

Awwww how romantic, they both pulled themsels together haha! anyway the guy on the left won :)

[stalker7d7]

a: It DID move.

b: experiment failed

c: why are you wearing lab coats?

d: MIT? This is pre-first grade knowledge to me...

[quidproquo2004]

@stalker7d7 You learned about Newton's laws before first grade?

[stalker7d7]

@quidproquo2004 I had no clue who Newton was actually. But I guess some people(such as yourself apparently) just don't understand things with out them being spelled out for them. It's obvious that if you have 2 objects pulling each other with a rope(with consistent forces) that the center won't move. Knowing the exact terminology, and knowing how it works, are two different things.

[quidproquo2004]

@stalker7d7 Yes and no. If you don't have terminology, then you can't communicate. If you can't communicate, then you have nothing to offer.

[stalker7d7]

@quidproquo2004 Your logic is flawed. Terms are what we call the things we learn. Terminology can't possibly exist without first being able to explain what it is. You use terminology to simply shorten the length of time it takes to get what you want to say across. Terminology is a time-saving tool used for communication, and you can communicate just as well without it, it just takes a bit longer. Thus, you have the same amount to offer. Please rethink your logic.

[quidproquo2004]

@stalker7d7 What you are saying now is different from what you said originally. I agree with what you are saying now, but I still don't agree that you understood Newton's laws before you were taught them.

If someone setup an experiment for you whereby a marble was placed atop a slide and you were asked to predict how long it would take the marble to roll down the slide, could you have down this at age 5? If not, then you did not understand Newton's Laws at that age.

[stalker7d7]

@quidproquo2004 I think you severely misinterpreted what I was saying... And yes, I could predict how long it would take to roll down, a few seconds. Exact timing, no... But generally, yes...

Newtons laws are extremely simple:

Something that is moving will keep moving until something else stops it.

The bigger it is, the harder it will hit or the harder it is to move.

When you push something, it pushes back... So you push it until it can't push back, and begins to move...

[quidproquo2004]

@stalker7d7 I know what Newton's laws are. If you could solve for the travel time of a ball rolling down a hill at the age of 5, then you must be a genius. You did claim you understood the laws before first grade, did you not?

I don't know about you, but I certainly wasn't exposed to trigonometric functions before elementary school.

[stalker7d7]

@quidproquo2004 You aren't very smart are you? I'm just gonna stop responding, as you haven't a clue what I'm talking about.

[vochitoken]

it would be nicer if the experiment ended with a kiss...

[mimic58]

Are you sure this is MIT level this all to me looks like level 1 GCSE physics ???

[TripleOG1991]

this video is homo

[TheZefMan]

Isn't this just conservation of momentum. For example, the guy on the right has a positive momentum (since momentum is a vector), so the guy on the left needs a negative and equal momentum in order to conserve the initial value for momentum -0.

Assuming they're of roughly equal mass, their velocities should be roughly equal, but opposite, so they reach the centre point at the same time. What's all of this talk about a centre of mass?

[pikachuthesquirtle]

dude... gay...

[ExistenceHappens]

I.E. the lady and the tramp spaghetti experiment...

[inademv]

Engineers in their natural state: very very gay.

[Psaris66]

@inademv what a gay computer you have designed by gay engineers... pff.. idiot.

[inademv]

@Psaris66 Hey, I got nothing against gays. Just calling it like it is.

[Psaris66]

@inademv ok sorry then

[AnonCaptainAwesome]

Reminds me of the Lady and the Tramp experiment.

[hk86]

It did move a bit due to differences in friction.

[gmlviper]

Can we do it with 2 girls next time?

[KaslarProductions]

Is this what you guys at MIT are spending so much time on?

If so, where do I sign? =)

[jms8220]

the only reason this works is because they weigh about the same

[daenumen]

@jms8220 no it doesnt matter how much they weigh.

look, if the guy on the left was say 10 times heavier than the person on the right, then the person on the right would keep tugging on the rope and pulling it closer and closer, but the other guy wouldnt move anywhere, so the centre of mass would stay the same.

like if you tied one end to a wall.

dont worry alot of people have the miss conceptions about Centre of mass/gravity.

[jms8220]

@daenumen ahhh i see, I like the way you put that. It definitely makes sense when you think about it like that, and you're quite right. This is why i don't go to MIT lol

[daenumen]

@jms8220 mm i shouldnt worry, took an apple to the head to get even newton to understand lol.

[junkymagi]

@daenumen People are confusing the center of the rope with the center of the mass. If the people weighed the same, the center of the rope is the center of the mass.

But, if one weighed 100 and the other weighed 300, the meeting point of the two carts would be 3/4 of the way across the rope from the light to heavy person

|---------------|here|-----|

[daenumen]

@junkymagi roughly speaking, however, that point wouldnt be the centre of mass, as a result of friction etc.

the mark on the rope acts as a reference point with respect to the one dimensional problem as represented by the rope.

but you are correct in saying that the mark on the rope does not relate to the centre of the mass of the system unless both people weigh the same.

[wrxsavvy]

you should of kissed like lady and the tramp

[memonahmedsafi]

dumbass! WTF?! they wanted to have sex??

[staphinfection]

Guy on left wins...

[Gello81]

::Plays Barry Whites lets get it on...::

[biplav91]

these guys should get a hd camera

[valdezmiguel2]

FIX THE FUCKING INTERLACING YOU STUPID twats!

[agun17]

Lower mass aka the guy on the right moves faster than the guy on the left.

Momentum n shit.

[Trajedya84]

genius!

[JuryDutySummons]

No Win? Looks like WIN-WIN for a pair of young lovers to me!

[kakashpwns]

@JuryDutySummons haha nice

[drpjmtaylor]

@JuryDutySummons geniunely thought we were heading for a kiss then!

[davidls11]

@drpjmtaylor Like in Lady and the Tramp.

[gonzalo1974]

What a romantic experiment!

[allahtakesituptheass]

pff. just an excuse for some nerds to indulge in some homo-erotic touching in the lab.

[supergiff8]

Oh yeah, because they're afraid to show their affection for other men, unlike you.

[allahtakesituptheass]

huh?

[m8cct]

wouldn't this only be the case if the two people were the same weight?

[TexanProgressive]

I don't know why you got a thumbs down. You are correct. The center of mass still will not move but it will no longer be right in the center of the two. So if the guy on the left weighed twice as much, we would move one foot in for every two feet the other guy moved.

[jholdaw2]

no, i think this is because of the law of physics that says for ever action there is an equal and opposite reaction.

[m8cct]

right, but that means that the force that one exerts on the rope, the rope exerts back on them, this means that the same force is applied to both guys on the cart, but the mass still factors in, because the amount of mass that the two people have dictate how quickly they will accelerate. If one of them had, say, twice the mass the other one did, that one would accelerate half as slow and not move as far.

[bigmike7maccom]

The equal and opposite reaction really means there is an equal and opposite force exerted on each object. It doesn't mean each object will move the same distance. The forces are equal but if the masses are different they will have unequal acceleration.

[hitmantech]

Maybe they are. Or pretty close.

[nmacgre]

No safety glasses? At least they had lab coats on. It CAN be won, but not if you're both pulling equally hard, like in this video.

[DeltaChip]

i know rite?? safety glasses is a necessity

[dentaltaco]

Incorrect, it's a principle of physics. The equal and opposite reaction thing. You will always be pulled exactly as hard as you are pulling so the center always stays in the middle spot.

[TexanProgressive]

Yes, the force is always the same, but the acceleration is that force divided by the mass. So if the masses are different, the accelerations will be different.

[bigmike7maccom]

No. "Equal and opposite reaction" really means "equal and opposite force". The forces in this case are equal but the acceleration of each person is inversely proportional to the mass. The larger the mass, the smaller the acceleration. That's why the Earth doesn't fall upward toward you. The force of gravity on both you and the Earth is equal, but your mass is so much smaller-- that's why you're the one that accelerates. F=ma.

[hellomate639]

What they should do is get two people and add weight to the cart with the lighter person until both are equal, then have one pull while the other one simply holds onto the rope. That would demonstrate equal and opposite well.

[133712ap3]

What the fuck was that, seriously?

In an overtly homosexual voice: Hey Sssteve, lets go demonstrate how we tug each-others ropes.

[133712ap3]

He grabbed his leg afterwords....

[johntkucz]

LOL. chuckle.

[Afflictedsolace]

what was the point of that?  that's not science, that being stupid.

[the5445]

it would depend if there is more friction on the weels of one cart, then the other cart would win

[JFoun321]

Those two guys were smiling. That was kind of gay.

[AYOitseny]

JFoun321: Those two guys were smiling. That was kind of gay.

-- Lol.

[tucsonmm]

too bad that it looks like the center of mass DOES move. lame experiment.

and I agree that they should have kissed...the mood was perfect and you guys blew the opportunity!

[daregan12]

Shouldn't this end with a kiss?

[willberb]

What if one of you pulled and the other didn't? Would that mean he didn't love you anymore?

Just joking.

[LanceTheBlueKnight]

It's because every action has an equal and opposite reaction. :)

Since the wheels of the carts have similar friction acting on them, and the guys seem to be about the same weight, the carts will move the same amount. Nice demo, I've never quite thought of it this way.