You Laugh You Physics ft.

Today Flammable Maths and I send each other some maths/physics memes to settle the score on who's the biggest loser, and he pulls out all the stops to convince us it's him. If one of us laughs at the other persons meme, we then have to solve a physics problem.
Check out Flammable Maths part: You Laugh You Math:
• You Laugh, You Math......

[@yash-sri]

Andrew : *needs random number generator* Also Andrew : *imports numpy and sympy for no reason at all* A true physicist indeed ! 👍

[@yash-sri]

I would like to thank my mom and dad for this achievement . I have worked really hard for this....😍

[@yash-sri]

500+ likes. Yikes 😬

[@kevinflummi2822]

6:48 is the most beautiful equation i have ever seen. The beauty of first assuming pi equals 3, just to assume pi is 3.3 one calculation later is just incredibly hot

[@RhynoBytes857]

Well pi squared does equal g

[@joaoruxa]

Idk why but im laughing so fucking much G/Pi=G/3=3.3=Pi Lmao

[@eccotom1]

​@@RhynoBytes857no...

[@PapaFlammy69]

Andrew can neither maths nor phys confirmed! :^)

[@PapaFlammy69]

Link to You Laugh, You Maths: kzbin.info/www/bejne/kKGliJewiJJ8bck

[@amarnathk9398]

@@PapaFlammy69 oi what, did you just link your own video rather that basement boy doing so?

[@masternobody1896]

you gotta stop with anime

[@masternobody1896]

and buy disney instead

[@turtle8558]

He can't even laugh

[@nasirsiddiqui7573]

andrew's one of those people who doesn't name his jupyter notebooks, so he's basically like all people

[@telotawa]

10:50 should have just been like "well, assuming the equivalence principle, the equivalence principle is true"

[@tobiasgorgen7592]

5:48 her brother? So Andrew's grandparents named their kids Joe and mom? Absolute legends

[@TunezCottage]

There are levels to this, and Jens exceeds all of them

[@tommc1425]

For question 6, both of you are correct, you do have to accept that inertial and gravitational masses are equivalent, but past then you have to do the calculation as Jens did and you find that to lowest order the result is independent of the small mass

[@PapaFlammy69]

Thx Thomas! =)

[@interpird350]

Is it not that (for the same mass) a smaller object has a smaller surface area thus less air resistance? If there is no air resistance then t_fall is independent of the mass of the object whereas t_fall depends on the mass when there is significant air resistance. Not exactly a mathematical answer though

[@tommc1425]

@@interpird350 I believe air resistance was neglected for the sake of a quick calculation, but in general a true calculation of the fall time will involve both masses. The only reason we normally treat the bodies completely independently and don't use reduced mass μ is because we can treat one of the masses as static. For a full calculation you should include air resistance too, but for that we would need to know more than just mass, you can have small heavy objects and large light objects, so the mass would be one of multiple input parameters.

[@interpird350]

@@tommc1425 Yes now I see the point. Thanks for explaining

[@DocBree13]

Thanks for the clarification - I only knew about the explanation that Flammy described. I’m still a bit confused about Andrew’s, but I’m going to look it up and your description made it a bit clearer. (I only took two semesters of algebra-based physics back in the 80s)

[@LoganCTanner]

I love it when you guys do things, I don't have friends and it's nice to see other people have friends, especially STEM friends

[@PapaFlammy69]

[@KevinS47]

Man, that infinite series one was so easy, I solved it in 10^-4 seconds, and I'm -1 by the way.

[@megauser8512]

lol

[@mastershooter64]

damn it took you that long? i solved it in (insert a hyperreal number) femtoseconds, I'm -omega btw

[@DeathGeco1000]

1:43 the computer in the back 😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂

[@PapaFlammy69]

finally someone noticed XD

[@maureendotson4634]

Planet Joe?!? At least I was in a penthouse. 😏 ~ Love ya! Mom 💕

[@nikhilnagaria2672]

Hi

[@maureendotson4634]

@@nikhilnagaria2672 Hi back! ~ Andrew’s Mom 💕

[@natejc93]

I literally said “NOPE” at the same time out loud at 6:28 and laughed my ass off

[@mann5861]

YAY!! another crossover of my two fav KZbinrs :D

[@PapaFlammy69]

[@coin5207]

Arguably the funniest questions yet, out of the you laugh you ... cinematic universe The "how much force from Jens anus" was a real cliffhanger and left me excited for further seasons of this format!

[@lock3460]

This is the most nerdy video ever, i love it 😂😂

[@theend-uu5wd]

“this is how Italian people sleep” was the funniest for me

[@HershO.]

Absolutely love it when you guys colab bro keep fucking up math Andrew

[@denizgoksu9868]

Math problems phrased as stories: John goes to the gas station and buys 453 watermelons. At dinner, he eats 257 of them. How many watermelons does John have left? Physics problems phrased as stories:

[@mousachmait40]

I’m loving the consistency

[@zackarysemancik5491]

Awesome! One video with my two favorite KZbinrs and Jens!

[@deemedepic7721]

Ah yes very easy maths that I can definitely do.

[@meetghelani5222]

Do something related to relativistic mechanics! Also, ❤️ to both those people in this video!

[@genny1814]

I’m no physics major, and haven’t done mechanics in a while. But I’m damn certain that last answer is 69N. -electrical engineer

[@sebvv5219]

6:40 "9/3=3.3" You read it here first.

[@ssahai04]

12:40 I believe the correct explanation is the one by Andrew where inertial mass and gravitational mass get correlated and hence cancel out. I could be wrong.

[@SwagmanDude]

I have waited a long time for this... My little green friend.

[@poutineausyropderable7108]

Add the acceleration of you toward earth + the acceleration of the earth toward you. Techniquely, you substract it. But the y both go in opposite direction. And negatives times a negatives is positive. F = GMm/r^2 |a (tot toward each other)| = |a earth| + |a you|. The force have equal norm. ar^2 = GMm/m + GMm/M ar^2 = GM + Gm ar^2 = G(M+m) ar^2 = GM(1+m/M) a= G(m+M)/r^2. The center of mass is pretty much where the center of the earth is. If m

[@DocBree13]

Loved this! I really miss the collabs with both of you and Zach.

[@swapnilshrivastava6889]

Brilliant, fun, and informative. You guys are awesome. Thanks for doing these! It's 138N, btw. 😂

[@leonayt3604]

I think we need to calculate also the weight. Then the force becomes 828N if g=10ms^(-2).

[@nako7569]

​@@leonayt3604Yeah ikr

[@bryantwiltrout5492]

I think papa flammy was high when he wrote all these questions 😂😂😂😂

[@sandeepyerramilli2942]

I thought it had to do with the properties of the gravitational force. The earth(or any body for the reason) exerts forces of different magnitudes in such a way that the accelerations of the bodies are the same.

[@coryn7322]

this has been one entertaining hour of brainrot lmao. Thank you guys, awesome videos as always ! :D

[@PapaFlammy69]

:3 Glad you had a blast

[@alberteinstein3612]

10:45 you could also say that since the distance traveled in free fall, and consequently the time of such a trip, is only dependent on g and the initial velocity in the y direction D=(v_O)(t)+0.5gt^2

[@Eigenbros]

These should be on the physics GRE

[@AndrewDotsonvideos]

I'd still find a way to bomb it

[@heiswatching]

love the double episode

[@Meurantbotha]

Older Andrew vibes! Love it!

[@ShaunakDesaiPiano]

8:42 assuming they mean linear velocity, you can never have a constant velocity if the question is about rotations since the direction is always changing lol. Shouldn’t it be constant speed?

[@tornikekalmakhelidze2712]

JEE meme was gold :DDD

[@sergiopastore1]

Problem: "Bro, I'll make it simple, there's just an object on an inclined plane, you can go on and calculate the fo..." Flammable maths: "TIME TO FIND THE LAGRANGIAN"

[@covfefe18225]

you laugh you unstable periodic orbits

[@covfefe18225]

ranging from lorenz, rossler, three body problem, forced duffing, etc.

[@shadow_navneet]

Q.6 (according to me is) F(due to gravity)=mg ......{eqn 1} well by newton's second law we know that F=ma .....{eqn 2} so substituing eqn 1 in eqn 2 mg=ma m and m got canceled g=a (which is fact) and hence proved mass doesnt play role in it and is considered negligible not for small obj but for all.

[@euphoria2253]

Yes but also consider that GPE is something that is shared between two objects so as the small mass moves towards the large mass, the large mass also moves towards the small mass(which is why small mass must be specified such that the movement of the planet towards the mass is negligible)

[@austin2508]

1:31 Huh, I wonder what function would have a graph like that?

[@PapaFlammy69]

:^)

[@mikuculus3720]

Two circles and a quadratic.

[@atharvbhalerao3062]

question 7. (correct any math errors i did this mentally without access to paper and pen) M = 69Kg, w = 690N v = 1m/1s=1m/s a = v-u/t = 1m/s^2 F = mg + ma = 759N that would mean he is shitting 759/10 = 75.9kg at 10m/s , that king of explosive diarrhea is quite literally ground breaking

[@Frits34000]

To get to 1 meter in one second, you have to accelerate at 2m/s^2. After one second the speed is 2m/s and it is zero at the start. The average velocity in that 1 second period is then 1m/s^2.

[@khavin-p1c]

7 PM in the morning lol🤣🤣🤣

[@PapaFlammy69]

:DDD

[@noahesmail3966]

I have a mechanics exam in 32 hours. this is my review

[@x0cx102]

7 pm in the morning is literally me

[@yasir5422]

papa flammy tip of the day: to get more money, commit tax fraud.

[@Gingermaas]

I honestly thought that 13:53 was hr*s at first, which made me laugh.

[@Gbzildo]

Andrew, you should make a physics book tier list, like E&M Griffiths S tier, Jackson Btier, Pathria A tier...

[@tsuyoshiueno8475]

The shape of that graph on his screen looks familiar 😂😂😂

[@hadhad129]

Im an Electrical Engineer we called H the magnetic Field in the 2nd half of the program, it was like what's these lies? B used to be, B i think is the magnetic field density of the material because of Mu of the material

[@TranquilSeaOfMath]

🤣 On the last question, assuming no air resistance and no friction from the toilet seat: He reaches apogee of 0.0509684 m in 0.1019368 s. We have an average force of 700 N when adjusted for significant figures.

[@johnnyc8669]

Question 7) mass = 69kg, average change in velocity = 1m/s. Average Force = mass * average change in velocity/total time = 69kg * 1m/s/ 1s = 69 Newtons. When he said explosive, he really meant explosive

[@josemanuel9305]

You need a force of 138 N to raise it two meters without gravity. With gravity it would be 814.2 N. Correct me if I'm wrong.

[@demdude1744]

in a vacuum yes, but the force of gravity acting upon him is around 676.2N so the force needed to lift him would be 69 + 676.2 = 745.2N

[@tobiasreckinger2212]

How disapointing seeing Jens use 10 for G instead of Pi²

[@ast9627]

As an engineer I am appalled by the incorrect unit conversions

[@haryr_]

At 18:00, why does flammy invert the x and y coordinates?

[@ThomasTheThermonuclearBomb]

You guys should have Zach write the questions next time

[@pinklady7184]

Actually, I am practising shorthand writing on you, while listening to you. Your topic is interesting.

[@Chaosdude341]

Only the mightiest.

[@codieloades5741]

One of the funniest videos I’ve ever seen 😂😂😂😂😂😂

[@AndrewDotsonvideos]

Glad to hear it!

[@codieloades5741]

Hi Andrew how are you

[@vedwalvekar715]

[m]is negligible because acceleration due m on earth would be very very small.

[@mesterfriend402]

we missed you bro

[@johnchristian5027]

What is the name of that writing tablet thingy that both andrew and flammy uses?

[@jitendeka5619]

Love you both 😍

[@PapaFlammy69]

[@trentoncathcart9027]

Could you do a video explaining geometric unity?

[@sierpinskibrot]

I miss this series so much

[@laalsees8917]

What is the name of the kind of tablet things you both use for writing?

[@T3WI]

16:52 Andrew should make this Jens moan his ringtone

[@Stixch7]

This might be a bit late to the video but how are you and kelly going? I haven’t heard of you two in a long time

[@arslanbabur]

Unironically watching this to understand how to approach unique problems.😂

[@ThomasTheThermonuclearBomb]

814N

[@chaosstreams777]

The word 'basically' is the only thing i can hold on to in engineering.

[@nickfury4048]

I wish You guys were My teachers

[@charlz3238]

Hi Andrew, I'm a theoretical physics undergrad considering going on to do a PhD with the hopes of maybe someday being a researcher. I think it would be cool if you made a video talking about how competitive it is trying to get a job in research. I understand that getting a research position - especially as a theorist - is super difficult and competitive and I'm wondering if you have any insights as to how to maximize your chances of reaching that end goal. I've seen a lot of posts on r/physics talking about how unlikely it is to actually get a research position as a theorist and it's been a little disheartening so it would be cool if you could talk a little bit about it.

[@charlz3238]

Also I wanted to say that I've been watching your videos for years and they always get me excited to learn more physics as well as being super helpful as a guide for what to expect as a physics student so keep up the good work!

[@rajeshshimar3863]

Physics laughing in the corner 😂😂

[@pinklady7184]

What tablet is Flammable Maths is using?

[@PapaFlammy69]

A Gaomon PD1560 I believe?

[@realstrength1379]

assuming mass of object is negligible is wrog if object is your mom

[@timofeysobolev7498]

You laugh you Number Theory

[@MasterCivilEngineering]

Amazing video❤❤🇺🇸

[@jackieb2853]

Next video idea: you laugh you code? :D

[@WhyneedanAlias]

It's my first video here and I instantly wondered if he was an engineer

[@maureendotson4634]

Welcome! ~ Andrew’s Mom 💕

[@imcalculus]

Question 8 was solved incorrectly, The mass is around 3000N because 0.43 was accidentally written as 0.48 which might have affectedthe calculation

[@hicetnunc1129]

Where's my mistake: In the Lagrange question, isn't the vertical coordinate r * sin(phi), therefore the potential U = mgr * sin(phi) making the velocity gt * sin(phi)? Why the cosine?

[@anjalpaudel8713]

What is the background music?

[@cuomostan]

I’m 14 and these questions took my less than 0 seconds to do cause they are SO easy hahahahah

[@mikuculus3720]

We do string theory second year for jee

[@mgkkhan5891]

Hey flammable m.aths it's my request please do videos on algebraic topology and algebraic geometry And stochastic differential equations please if you can't please Andrew make videos on this

[@Jackorite]

7pm in the morning....

[@taylorandrew2002]

Epic

[@ethanbartiromo2888]

“Some of you know him by worse names than that”

[@prakasha9934]

1st question why we need to divide by 10

[@x0cx102]

Who's Joe referring to.. Joe mama?

[@woutmostrey401]

Christmas came early🥰

[@monkerud2108]

And no marks for me fir spelling weung stuff right hehyt

[@abieleviciute]

this video is cursed

[@PapaFlammy69]

yeye :^)

[@user-nj1qc7uc9c]

138N?

[@atheoristspointofview7059]

Isn't the last question just 69000N?

[@atheoristspointofview7059]

Wait no its 69 I'm dumb lol, I saw the kilo in kg and immediately thought to multiply by 1000😂

[@PapaFlammy69]

@@atheoristspointofview7059 :DDD

[@T3WI]

Can’t wait for Andrew’s mom’s comment on this video!

[@maureendotson4634]

Here ya go! Happy Holidays Tewiiiiii 🎄 😊 ~ Andrew’s Mom 💕

[@biraboom]

ben affleck that u??

[@chair547]

the joke is that italians sleep like normal people because they are. We're all humans regardless of race and the world would be a better place if we were all nicer to each other. It's actually a really beautiful message.

[@l.3ok]

Now I get it 🤣🤣🤣🤣🤣 respect ppl 🤣🤣🤣🤣 so funny

[@Nicolas100399]

What's the name if the subreddit?