The Rocket Equation feat. Elon Musk

[@quasarstarpower2858]

I don't know why I expected elon to pop into the video any point .

[@idjles]

Click-bait title

[@logansmith-perkins515]

I mean clearly, the Leaky Pendulum is a rocket.

[@akselai]

well, approximately xD

[@logansmith-perkins515]

@@akselai sin x = x implies approximately = equals Clearly trivial.

[@YounesLayachi]

@@logansmith-perkins515 redundant even

[@YounesLayachi]

First time I read this comment I didn't get what leaky pendulum is 😆

[@YounesLayachi]

The liquid fuel and liquid oxidiser are stored in 2 separate tanks and one tank sits higher than the other

[@anantsharma314]

Just imagining who is gonna ride the new spaceX model 😂

[@denisbanushi1257]

Andrew Dotson

[@kathanshah8305]

@Leonardo #toddyn joe mama

[@nombreusering7979]

It's June tho

[@YounesLayachi]

S3XY rocket

[@Opalescencz]

Yo mama

[@turtle8558]

Me after finding out elon isn't in the video: my disappointment is imesurable and my day is ruined

[@supramitra]

When the rocket starts to leak white fuel from it's head😅

[@PapaFlammy69]

:D

[@Ryan-gq2ji]

Bruh

[@neilgerace355]

Attitude thrusters

[@marvelousfitness4898]

cum lol

[@ShadowZZZ]

14:24 imagine casually doing the fundamental theorem of integration by a basic substitution

[@kathanshah8305]

It would be a HARD task to make it so BIG

[@shreysharma726]

just need some stroke

[@stlemur]

Now do the relativistic rocket equation!

[@darpol2431]

Thank you so much. I'm a high school student that's trying to understand the rocket equation and this video made me understand the equation

[@PapaFlammy69]

nice :)

[@RC32Smiths01]

The rocket equation, *it's a beautiful thing*

[@eccentricity23]

Isn't the natural logarithm usually written as ln(), not log()? More importantly, this is an excellent video. As a high school student who just finished BC Calc, I had to pause a few times to follow along, but I feel that I really understand this derivation now. Thank you!!!

[@PapaFlammy69]

Most Mathematicians usually use log for ln :) Glad you enjoyed the video!!! :)

[@keepthefaith9805]

Deviation not derivative

[@keepthefaith9805]

Never think you understand or know

[@keepthefaith9805]

Always push for the unknown

[@Davquest]

"A rocket zwoof" - Papa Flammy, 2021

[@Draginx]

I’ve been watching papa flammys videos for a while now. I have to say they just keep getting better and better! I love physics and maths and this channel!

[@adudeontheinterweb6571]

joe is planned to ride the new "deez nuts" spaceX model rocket in late 2022

[@miscellaneouscrap1237]

Jens keep up these Classical Mechanics problems they are really good to watch

[@PapaFlammy69]

:)

[@albertodemarco3687]

He's got Hagoromo's chalks, so he must be good

[@thorbenmaas7848]

They are way to nice. My teacher has them.

[@u.v.s.5583]

There is something I want to ask the Hagoramo freaks. Is it possible to draw a figure that does not resemble a penis with this particular chalk? I suppose it is, but I have never witnessed anything drawn with that particular chalk that would not be congruent to an outline of a penis.

[@hardikjoshi8557]

Sir Elon be like- Decoding "Secant of angle C"... deeznuts.....😂❤️🔥

[@dhoyt902]

Elon!! EEllonn!! Get my coffee Elon!!!!! - That's the level of power I have in my dreams.

[@laxminarayanbhandari855]

Flammable Maths : Proves law of conservation of momentum. Me who had learned that conservation laws can't be proved : WTF.

[@PapaFlammy69]

they can be proven by accepting the underlying axioms :)

[@soutriksarangi5580]

All conservation laws can be proved from symmetries of nature.

[@anandsuralkar2947]

Momentum conservation is probably from symmetry of space in Direction of travel🤷.not sure . comes from noether's theorem. Mathematical proof.

[@Ferraco05]

I was actually thinking about Newton's second law in the form F=dp/dt these days, and particularly considering the case when mass is not constant. So I'm glad the universe conspired so that Papa Flammy would make a video about this very topic. I really liked how you connected the derivation with conservation of momentum.

[@jameswalters8755]

Excellent exposition. Cheers!

[@AppliedMathematician]

Why did you not start with the law of momentum conservation: At any time t total the impulse is conserved, i.e. the time derivation of sum over all impulses is zero. And you can start with your explanation at 11:17.

[@SuperMariocapo]

Why u sub when when you can just cancel dt with dt, in (dv/dt)*dt and (dm/dt)*dt Maths the engineering way 😎

[@PapaFlammy69]

bruh

[@NateROCKS112]

When deriving conservation of momentum, you can't use F=ma because it breaks down with variable mass, no? If you integrate m1a1 dt, you can't just factor out mass since it varies in the rocket equation. F = dp/dt is a more suitable formulation in this case. Of course, I get the point of doing it the way in the video, because it's more of a "discovery" thing. I just wanted to note this as a "well actually" commenter who barely knows anything lol.

[@MYCHEM1CALR0M4NCE]

Forget phYsics, you should make a GEOphysics video (stuff like Fourier domain transforms to extrapolate potential field data with laplaces equation, or nice geometry with seismic stuff like the migrators equation) - would be very cool to see!! I’d be happy to send over material you could make videos on :)

[@MichaelT_123]

Well done! In the next step consider making your rocket more realistic by launching it in a gravitational field and finding out how it affects the speed of both the rocket and a fuel vector field.

[@einsteingonzalez4336]

People say that something is rock science for a reason. It’s when something feels too complex. But because of the reality behind this equation, it’s not as complex as one thinks.

[@youceflaimeche521]

was waiting for this since a long time thank you so much

[@PapaFlammy69]

np :)

[@eloncole5702]

Sir in next class can you please explain about Riemann Hypothesis which is solve by a great Physicist Dr Kumar Eswaran. Thank you from advance 😀

[@jimmyt_1988]

Any chance you can go over the equations that occur when interruptions in waves occur. Like a pond with 2 points where force is emitted - or like a double slit experiment?

[@GrimmmReaper]

WOW this was very well explained

[@PapaFlammy69]

thx! :)

[@yasurikressh8325]

Really loved to hear about your story on Dorfuchs‘s Channel. Good day :]

[@PapaFlammy69]

hehe =)

[@theevilmathematician]

I just told Andrew Dotson the new model. Andrew Dotson is building a giant supersonic missile to destroy your basement with the new model.

[@thecosmos7671]

We learning Physics here too 🙏⭐😀

[@nagasaipurvaz4251]

hey papa can you make a calculus course for kids youtube series where you explain the simple concepts like differentiation and integration tips and area

[@PapaFlammy69]

hmmmm, sounds like a nice idea! :)

[@Kashboul]

These videos are top notch

[@PapaFlammy69]

thx :)

[@DatBoi_TheGudBIAS]

Man u da best drawing rocketss

[@PapaFlammy69]

:^D

[@cesaraugustogilacosta5336]

Good video. You could also generalize problems with variable mass using Reynolds Transport Theorem, pretty useful

[@tiff4675]

Haha, the newest SpaceX model :D Now the secret's out!

[@vidhanp482]

I understood everything. It was very well presented. Thank you.

[@dariusm_]

Lol nice, I was waiting for the specific impulse in the derivation but it’s not a huge deal 🤣

[@kathanshah8305]

That rocket experiment took place last weekend ;->)

[@PapaFlammy69]

:^)

[@gregoirej297]

Incredible I just realised a presentation for an exam on this exact subject !!!

[@chickenphoenex3934]

I'm in no way a physics or math enthusiasts and I'm just curious about math equations used in real life inspired from the novel I'm currently reading. I'm impressed. I finished the whole video and not understand. Salute to all commentors....

[@frozenmoon998]

SpaceX: *new model* Andrew Dotson: *yes*

[@syedinayat3548]

hey papi old intro is back(you took my advice ) btw i am waiting when elon will post it in his twitter

[@syedinayat3548]

if he does not we flammies will spam the video

[@syedinayat3548]

btw were you taking about this rocket twitter.com/SpaceX/status/1407075914140176390

[@PapaFlammy69]

yeye

[@thecosmos7671]

Thank you for the video sir! We look forward to more and more informative videos in the future sir. Thank you 🙏

[@1nd93dk3]

Apparently my and my friends came up with a joke in school about telling a teacher that "I will pay you money as a way of donating to the school, and I will pay you 10 DN" The teacher will say "What is dn(they think its dollar note)?" and then you reply "deez nuts"

[@abdullahyousef3596]

Hey, I have the blueprints of the new rocket from 16 years. HOW????

[@mikemcguire1160]

Here is a related variable mass question. The crack of a whip is due to the end exceeding the speed of sound. How does this happen? No human can move a hand at that speed.

[@aniketeuler6443]

So can we expect you then to be ceo of space-x Jens ?😂😂

[@PapaFlammy69]

Already am :^D

[@aniketeuler6443]

@@PapaFlammy69 😂😂

[@kaasci]

This brings back memories of KSP

[@blusham4629]

You made me brake a plate by referring to your rho as a “p”

[@anthonyguerrera191]

When you say that the rate of expulsion (exhaust velocity) is constant, what reference frame is this velocity from? Surely, if the velocity of the rocket is increasing and the velocity of exhaust with respect to the rocket is constant, then then the velocity of exhaust w respect to the ground isn’t constant. So my question is what inertial reference frame is the conservation of momentum applying to?

[@naturalsound6615]

you can do it with both reference frames, the ground and the rocket itself. In the video he only applied it to the reference frame of the rocket itself.

[@kksean4040]

@2:23 The shape of rocket looks like giant D.😂 not sure if he intended or not.

[@PapaFlammy69]

...

[@emilioschmidt2106]

Deez Nuts stands for: Dragon-Engine + Electrical Zone (for) New Ultra terrestrial Starship

[@avishkarmandlik7477]

Even though this rocket is not fully ready to launch it has many problems. Sometimes it doesn't get ready to take off, somrtimes it just burst before take off.so many problems.

[@randymartin5500]

That was quite humorous, you are like the Howie Mandel of math before he lost his hair lol. Can you derive the escape velocity of the earth? It is pretty cool to see that it is not dependent on any masses involved.

[@meowwwww6350]

2:20 that's not spacex that's spacexxx 😂

[@alanrodriguez7988]

I imagine mathematicians as physicists or engineers and taking difficult mathematics as simple arithmetic 🤣

[@DarkRedZane]

I have a Pure math graduate friend that has troubles dealing with the applications of math because he cannot visualize them well. He told me he had troubles with something like the Kepler's Equation for planetary motion for example.

[@roberttelarket4934]

@@DarkRedZane: I knew in my undergraduate years 1967-1971 Phillip Trauber who taught himself in his high school(I went to a different one in the U.S.) every undergraduate course he would take. He hated physics and didn't understand it. He got his PhD in Abstract Algebra from Princeton University! Being a mathematician is not interchangeable with a physicist. Therefore it is easily conceivable there are plenty of great to just decent physicists who are not good at math. However math is indispensable for them so they must have a decent comprehension of it!

[@alanrodriguez7988]

​@@DarkRedZane ​ That's the exact same thing that happens to engineers when they want to do something that requires technical knowledge - they do it, but it's incredibly terrible and quite risky. My opinion is that they need to take technical classes to have an excellent and safe job. Similarly, pure mathematicians must take applied mathematics classes to get the mindset to relate abstractism to the real world and then they can become more "powerful" in their field.

[@tamzidrahman2673]

That’s interesting 😃

[@spaceshuttle8332]

Navier-Stokes equations next?

[@hardikjoshi8557]

Waiting for Sir Musk to tag this video in his twitter handle. 😂💟🔥 🇮🇳💟🇩🇪 Your boi,always>3

[@YounesLayachi]

Let's call the momentum of the rocket system to be just PEE

[@ivangospodarski80]

I'm surprised you didn't use the meteor-head meme format for the thumbnail

[@neilgerace355]

I am a little disappointed because I didn't see Comet Tsiolkovsky in this video.

[@PapaFlammy69]

sry :'( I thought that 3B1B riding the "rocket" would be funnier ;_;

[@isaacwalters747]

@Flammable Maths Do you enjoy number theory?

[@MertErcan95]

Just to make sure everything is clear: At 6:37 the term you use "the pushing down" and the fact that you hold the chalk above the ground just as if it is flying like a rocket made me think "Is he going to explain how the rocket accelarates by saying it pushes down the earth" for a second, which is not the case. Then, you made it clear it was just an example by stating out that the total momenta of the particles coming out of the rocket and the rocket itself is going to be a constant. Also, i think you meant to say this chalk is going to pull up instead of pushing down, assuming that you were talking about the gravitational force. Is that correct?

[@Sam-gd3dm]

"ain't that what the physicists, the chads and the virgins call momentum? " LMFAO 😂😂😂😂

[@PapaFlammy69]

:D

[@honortruth5227]

If Ve is constant then V-dot is 0, no?

[@iaexo]

Is that phallic symbol a reference to Musk?

[@ngc-fo5te]

Well Musk is a dick.

[@tpstrat14]

So cute and relatable. Funny shirt too. Gonna go to another channel though because I want to learn about the rocket equation. 2 minutes in and nothing

[@animeniacthephysicist9557]

2:18 nice rocket

[@PapaFlammy69]

thx :^D

[@dienelt5661]

you should have used z for your substitution, you know to get dz = a*dt

[@neilgerace355]

6:00 How? I didn't quite catch that.

[@demetriuspsf]

How about the friction at the tip of the rocket?

[@christineclement6941]

I did like the video. Thanks, papa!

[@forkom3_muhammadfathany959]

pretty cool thumbnail, dude

[@speedysenu4183]

That rocket though ☠☠

[@jordanweir7187]

Will this new design be made out of .. ... . .. flammable material?

[@PapaFlammy69]

ye, ye

[@Juul32]

Shouldn't the integration bounds be denoted in terms of time?

[@srallulrich]

You were a bit inaccurate with momentum conservation law

[@pikminlord343]

Such a cool video!

[@PapaFlammy69]

thx :)

[@kathanshah8305]

That meme as old as solar system

[@mathlover2299]

About the leaky pendulum. I don't think that you can treat a time dependent mass as a generalized coordinate. Let me know what yall think

[@micahpalin6136]

im so confused, you are saying that the total mass times the total velocity and then you differentiated it. how did you switch it out for the V sub e if it should still be total velocity?

[@blackhole3407]

3:19 1l per minute? Rockets consume like 3000kg per _second_

[@PapaFlammy69]

like hell I care about the real world lol

[@kiligir]

Is the English version of the shirt you have on going to be made available for sale soon? I think my students will find it hilarious. I could only find the German version on the website!

[@PapaFlammy69]

Check out my personal Teespring shop! Link in the description:)

[@gamingstars8956]

This rocketcan change many things

[@vjekokolic9057]

Best physics teacher ever

[@lordofutub]

Huh... That rocket diagram looks a little weird 🤔

[@HardeepSingh-qp3pe]

2:27 thats not rocket!! For sure

[@PapaFlammy69]

it is :^)

[@Divyanshu-on8uz]

Bruh when he talked about SpaceX new model DeezNuts I literally believed it might be true as it's Elon Musk's company and the things he's done till now and searched it, only when he said it's between him and musk I realised it's a joke. 😂

[@mr.mirror1213]

DeeZ nuts rockets uses Papa's secret juice to propel forward

[@matthewcurmi8016]

Wait. Isn't that new shephard?

[@joeljuntak4106]

[20] Sebuah senyawa non volatil Z, digunakan untuk membuat dua larutan yang berbeda. Larutan A mengandung 5 g senyawa Z yang dilarutkan dalam 100 g air. Sedangkan larutan B mengandung 2,31 g senyawa Z yang dilarutkan dalam 100 g benzen. Larutan A mempunyai tekanan uap 754,5 mmHg pada titik didih air normal dan larutan B mempunyai tekanan uap yang sama pada titik didih normal benzen. Hitunglah massa molar dari senyawa Z pada larutan A dan B!

[@CepheusMappy]

Kok jadi kimia- 💀 Bang flammy bukan kimiawan cuy

[@GredlPopedel]

Gibt es so eine Gleichung für sich horizontal bewegende Objekte? zB ein Flugzeug

[@harshitpuri2804]

The rocket may have 420 thrust

[@PapaFlammy69]

:^)

[@2199SPUDMAN]

"Extrude" is not the right word to use in your explanation. "Exhaust velocity" is the correct terminology.

[@phyarth8082]

Is third Newton law requires one extra term gravity force, force who resists to acceleration of rocket, in all video after start up from 3 to 5 seconds on full throttle rocket velocity is zero, reasons is that in 3 seconds rocket burns a lot fuel and gets lighter and starts to movie upwards. Earth gravity force keeps rocket on ground. This example is very easy, till 70s when nerds shifted to computer science sayin "this is not rocket science" means something very intuitive and not mathematically easy.