What is Stokes theorem? - Formula and examples

► My Vectors course: www.kristakingmath.com/vector...
Where Green's theorem is a two-dimensional theorem that relates a line integral to the region it surrounds, Stokes theorem is a three-dimensional version relating a line integral to the surface it surrounds. For that reason, Green's theorem is actually a special case of Stokes Theorem.
Again, Stokes theorem is a relationship between a line integral and a surface integral. Before you use Stokes theorem, you need to make sure that you're dealing with a surface S that's an oriented smooth surface, and you need to make sure that the curve C that bounds S is a simple, closed smooth boundary curve with positive orientation.
Since Stokes theorem can be evaluated both ways, we'll look at two examples. In one example, we'll be given information about the line integral and we'll need to evaluate the surface integral. In the other example, we'll be given information about the surface integral and we'll need to evaluate the line integral.
0:00 // About Stokes theorem
2:41 // Example 1
10:46 // Example 2
● ● ● GET EXTRA HELP ● ● ●
If you could use some extra help with your math class, then check out Krista’s website // www.kristakingmath.com
● ● ● CONNECT WITH KRISTA ● ● ●
Hi, I’m Krista! I make math courses to keep you from banging your head against the wall. ;)
Math class was always so frustrating for me. I’d go to a class, spend hours on homework, and three days later have an “Ah-ha!” moment about how the problems worked that could have slashed my homework time in half. I’d think, “WHY didn’t my teacher just tell me this in the first place?!”
So I started tutoring to keep other people out of the same aggravating, time-sucking cycle. Since then, I’ve recorded tons of videos and written out cheat-sheet style notes and formula sheets to help every math student-from basic middle school classes to advanced college calculus-figure out what’s going on, understand the important concepts, and pass their classes, once and for all. Interested in getting help? Learn more here: www.kristakingmath.com
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Пікірлер: 278

  • @sabdf2877
    @sabdf28774 жыл бұрын

    Finding videos for math this advanced that is this high quality and well explained is very rare. You and Prof Leonard have saved my calc grades 1-3! Thank you so much! Engineers everywhere bow down to you

  • @kristakingmath

    @kristakingmath

    4 жыл бұрын

    I'm so glad I can help! :D

  • @tichaonamarariromba4838

    @tichaonamarariromba4838

    5 ай бұрын

    ​@@kristakingmath you are the best mam

  • @omara4124
    @omara41244 жыл бұрын

    You and professor leonard should start a league of justice

  • @CCAPACCO

    @CCAPACCO

    3 жыл бұрын

    ohh yeahhh!

  • @joefuentes2977

    @joefuentes2977

    3 жыл бұрын

    I really really want at least one of them to do a series on differential forms!

  • @sekhar018

    @sekhar018

    2 жыл бұрын

    Lol 🤣

  • @shivangsingh5834

    @shivangsingh5834

    Жыл бұрын

    😂😂

  • @leslypaz5094
    @leslypaz50946 жыл бұрын

    I've spent the last two hours watching KHAN videos and looking up other videos/pdf on Stokes Theorem. I somehow came across your video, and I completely understand it now. You teaching method is superb and at good pace, and you just saved my life because my test is tomorrow.

  • @neemo9885
    @neemo98854 жыл бұрын

    i miss the old days when i thought triple integrals were a lot

  • @JoeyFaller

    @JoeyFaller

    4 жыл бұрын

    Yeah oh my god... It's been two months since I've taken vector calculus and I miss how easy it was in hindsight xD

  • @joefuentes2977

    @joefuentes2977

    3 жыл бұрын

    Line integrals for curves, surface integrals for surfaces, triple integrals for volume, and quadruple integrals for space-time continuum a.k.a. the end of the world.

  • @grum4205
    @grum42056 жыл бұрын

    I've been trying to learn Stokes Theorem through Khan Academy, and your video is so much more comprehensible then their entire collection of videos on the subject. Thanks so much!

  • @saqibshams5143

    @saqibshams5143

    5 жыл бұрын

    So true.....

  • @aojiao2823
    @aojiao28234 жыл бұрын

    Final in 2 hours, the best Stoke Theorem video on KZread! Thanks krista!

  • @picknikbasket
    @picknikbasket7 жыл бұрын

    I love these more advanced topics on your channel, Krista!

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    Thanks for the feedback!

  • @rgvfan7098

    @rgvfan7098

    7 жыл бұрын

    I don't like this video because fast

  • @bbergspitze

    @bbergspitze

    6 жыл бұрын

    rgvfan video still fine with video speed 1.25 ...

  • @Robertianocockrell

    @Robertianocockrell

    6 жыл бұрын

    What do you mean more advanced? Coz I'm doing this in grade 5 I'm 11 years old

  • @saifashraf8474

    @saifashraf8474

    5 жыл бұрын

    @@Robertianocockrell seriously? where do you study?

  • @IMadeOfClay
    @IMadeOfClay7 жыл бұрын

    Hi Krista. Love your channel. Super happy that you have done a more advanced video. Would love to see more :)

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    Thanks. :)

  • @alvin1342
    @alvin13427 жыл бұрын

    Loved the way you presented this concept, thanks a LOT

  • @tb4243
    @tb42434 жыл бұрын

    I was in tears over Stokes Theorem...I didn't understand what was going on at all. Twenty minutes with you and I'm out of the dark. I can't tell you how grateful I am.

  • @kristakingmath

    @kristakingmath

    4 жыл бұрын

    Awww that's awesome! I'm so glad it helped! :D

  • @Anmolorb
    @Anmolorb7 жыл бұрын

    Final is in 5 hours lmao thanks for saving me =D

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    Hope it went well!

  • @qilongli

    @qilongli

    6 жыл бұрын

    Im in the same boat lmao

  • @Jack-cm5ch

    @Jack-cm5ch

    6 жыл бұрын

    Mine's tomorrow boiiiiiiiiiiiiiiii

  • @jacobgomez_

    @jacobgomez_

    6 жыл бұрын

    Mine's tomorrow. so ducked

  • @yifan863

    @yifan863

    6 жыл бұрын

    mine is in 8 hr!!!!!!!!!

  • @Sstratos94
    @Sstratos947 жыл бұрын

    You have done a very good job! I really hope to continue the great work . I work with math like this almost every day and the only thing that I want to say is that the way that you present it is really wonderful. Good job !

  • @JoeyFaller
    @JoeyFaller4 жыл бұрын

    thank you for making this so much more intuitive

  • @pipturbine473
    @pipturbine4736 жыл бұрын

    Not gonna lie but this lady has advanced me from my year1-3 engineering degree, thanks Krista

  • @TheMetaAnalyst
    @TheMetaAnalyst6 жыл бұрын

    so simply explained. thanks krista

  • 4 жыл бұрын

    This is the best video i've ever watched about stokes' theorem. Lots of thanks.

  • @kristakingmath

    @kristakingmath

    4 жыл бұрын

    Thanks, Cem! I'm so glad you liked it! :D

  • @naomiaguilar685
    @naomiaguilar6856 жыл бұрын

    I've finally understood this. THANK YOU!

  • @cooperlane7147
    @cooperlane71474 жыл бұрын

    Congrats on 200k Krista!

  • @Mada1100
    @Mada11007 жыл бұрын

    Posted right after my final...

  • @Milgamix77
    @Milgamix772 жыл бұрын

    I wish i saw ur videos at the beginning of the semester i love u so much bruh

  • @pinkybananas1
    @pinkybananas16 жыл бұрын

    thank you so much!!!! i had no idea why my prof kept doing different things. your video cleared things up for me

  • @alvin1342
    @alvin13426 жыл бұрын

    thank you sooooo verrry much, great success attended me during my MATH exam last semester................ all thanks to videos through which I studied successfully................................... you've been a blessing to people like me..............................

  • @victorpaesplinio2865
    @victorpaesplinio28654 жыл бұрын

    Thank you for the clearest explanations! In the second example I solved for the other side (line integral) and it matched! I think that now I can nail my last calc 3 exam for the semester

  • @JumpinJellyBeansA
    @JumpinJellyBeansA2 жыл бұрын

    this video is so amazing im gatekeeping this from my class

  • @muwongeevanspaul9166
    @muwongeevanspaul91662 жыл бұрын

    Lady Krista thanks alot but truthfully,its a tough battle to understand; better to admit. Honestly,it requires u do for us more worked examples but above all,thanks alot so much.

  • @BBitIT
    @BBitIT2 жыл бұрын

    This is exactly what I needed thank you

  • @abdelz1617
    @abdelz16172 жыл бұрын

    Awesome video! Thank you.

  • @josecarlosribeiro3628
    @josecarlosribeiro36286 ай бұрын

    Hi Krista! Your classes are beautiful! Congratulations for you ability and competence! I learning a lot with you! Thank and my neste regards! José Carlos- Jacareí - São Paulo-Brazil.

  • @MAXTHEREMIX
    @MAXTHEREMIX3 жыл бұрын

    Thank you! The video is very well explained and useful!

  • @kristakingmath

    @kristakingmath

    3 жыл бұрын

    Glad it helped, Maxime! :D

  • @jedhe2695
    @jedhe26956 жыл бұрын

    Your video is so awesome! I get this now. Thanks a lot!

  • @mustafaomar7448
    @mustafaomar74484 жыл бұрын

    Thanks Krista, I have really enjoyed watching your videos.

  • @kristakingmath

    @kristakingmath

    4 жыл бұрын

    I'm so glad, Mustafa! :)

  • @hannahjoyceliz5821
    @hannahjoyceliz58217 жыл бұрын

    Watched a lot of videos about this topic( and it didnt quite help) but now, I fully understand because of your lecture. Thank you!

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    That's awesome! So glad it could help. :)

  • @ruffinist
    @ruffinist7 жыл бұрын

    Krista the KING FTW just in time for my final tomorrow!!! Dude, you are literally saving me, this was the one thing i was having trouble with

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    Good luck on the final! :D

  • @hchannel4425
    @hchannel4425 Жыл бұрын

    Thank you, this really helped

  • @mohammeda4116
    @mohammeda41167 жыл бұрын

    Honestly the cool thing about Stokes theorem is your explanation, thanks a lot.

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    Glad you liked it!

  • @andyfox4354
    @andyfox43544 жыл бұрын

    Thank you!!!! Life saver!! finals are in two days and i finally inderstood it

  • @maazqamar9567
    @maazqamar95673 жыл бұрын

    The explanation is awesoms

  • @SofiaSkywalker
    @SofiaSkywalker4 жыл бұрын

    This is amazing, thank you so much! At last this makes sense to me

  • @kristakingmath

    @kristakingmath

    4 жыл бұрын

    You're so welcome, I'm glad it helped! :D

  • @MadMagzzz
    @MadMagzzz7 жыл бұрын

    How would you visually interpret a negative area? Or does the sign matter at all to what it means visually? Thank you so much for all the amazing videos!

  • @harshitsinghai1395
    @harshitsinghai13957 жыл бұрын

    Thanks krista , love from india .....

  • @bhaveshohal3390
    @bhaveshohal33905 жыл бұрын

    That was really helpful

  • @samseuropejourneys838
    @samseuropejourneys8387 жыл бұрын

    all doubts cleared thanks :)

  • @melissaY63
    @melissaY635 жыл бұрын

    I think you use the same textbook I use for class I love your examples and how clear you make everything to understand!!

  • @lynettebirir7007

    @lynettebirir7007

    2 жыл бұрын

    What's the name of the text book

  • @gtowaru
    @gtowaru7 жыл бұрын

    you saved me!!!! i was having trouble understanding what the heck C is the boundary of S meant when trying to do my homework and this really helped me get it! thank you so much! :D

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    So glad it could help! 😀

  • @arshad3491
    @arshad34915 жыл бұрын

    Many thanks to you Krista King

  • @kristakingmath

    @kristakingmath

    5 жыл бұрын

    I'm happy to help! :)

  • @EsperanceBG
    @EsperanceBG7 жыл бұрын

    Thank you Krista!

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    You're welcome! Glad it could help.

  • @bu3b00d
    @bu3b00d7 жыл бұрын

    Thank you very much. Your video helped me a lot.

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    You're welcome!

  • @julianarrieta3125
    @julianarrieta31256 жыл бұрын

    Amazing video !!!

  • @tachrinc7361
    @tachrinc73615 жыл бұрын

    love you @Krista King that was awesome

  • @narnar707
    @narnar7077 жыл бұрын

    this was a very helpful and education video!

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    Thanks! I'm so glad it helped! :)

  • @janetm519
    @janetm5194 жыл бұрын

    *chef's kiss* here to say this video was so very much appreciated in the ... questionable year of 2019.

  • @Jeremy_Fisher

    @Jeremy_Fisher

    4 жыл бұрын

    Huh? What's so questionable? I'm positive it's still 2019 (for a few more weeks at least), and mathematics still works.

  • @Dra60oN
    @Dra60oN6 жыл бұрын

    Hello Krista, thanks for the video. Is surface S limited by curve C arbitrary chosen?

  • @Greg-It
    @Greg-It5 жыл бұрын

    literally math ASMR

  • @peacefulasmr8351
    @peacefulasmr83513 жыл бұрын

    You're the best!!

  • @simonematecna7624
    @simonematecna76245 жыл бұрын

    This was very helpful thank you!

  • @kristakingmath

    @kristakingmath

    5 жыл бұрын

    You're welcome, Simone! I'm so glad it helped! :D

  • @juanjoserojas2788
    @juanjoserojas27886 жыл бұрын

    your videos are amazing !! have you thought on doing one about gauss theorem?

  • @preetshah8739
    @preetshah87397 жыл бұрын

    Thanks a lot! Finally understood!

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    :D

  • @trendytrenessh462
    @trendytrenessh4624 жыл бұрын

    Great video but you didn't explain why we suddenly get negative P and negative Q at 14:31? (but still positive R)

  • @tb4243
    @tb42434 жыл бұрын

    Thank you so much!

  • @IaKhanic
    @IaKhanic7 жыл бұрын

    Also how would you solve it if at the end things don't cancel out? For example, if you were left with, Double integral of 2x da does it become integral from 0-1 integral from 0-1 2x dy dx like the first one?

  • @mcgarettsteve9077
    @mcgarettsteve90777 жыл бұрын

    keep the videos coming..really amazing stuff and clear explanatory i would like to request if u could do a video on gauss divergence theorem as well if u have the time for it..thank you..thanks for the video and appreciate the effort

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    I do have a video on divergence theorem that I'll hopefully be able to publish soon. :)

  • @NhanLe-lg7sg
    @NhanLe-lg7sg2 жыл бұрын

    Great video! Please tell me the app that you use to write in the video, it’s useful for teaching online. Many thanks!

  • @asamonson6866
    @asamonson68667 жыл бұрын

    Calc 3 final this morning. Thanks for the brain warm up. Awesome video.

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    Hope it went well!

  • @antruong1575
    @antruong15756 жыл бұрын

    Thank you, you’re awesome

  • @alvin1342
    @alvin13427 жыл бұрын

    would love to learn more from your videos , again can't say anything else but THANK YOU, have really been hepled

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    Aw thanks Alvin! Glad I've been able to help.

  • @2000pml
    @2000pml3 жыл бұрын

    Finals in three days ! Thank You!!

  • @alvin1342
    @alvin13426 жыл бұрын

    All thanks to YOUR videos Krista ***

  • @kristakingmath

    @kristakingmath

    6 жыл бұрын

    So glad they're helping Alvin!

  • @brydust
    @brydust6 жыл бұрын

    where did you get the relation \int \int_S curl F dS = \int \int_D -P etc.... dA? Is there a name for this relation? Or do you have a video where you explain this?

  • @thecornydocc
    @thecornydocc6 жыл бұрын

    I love this Lecture i really want to more video which helps us ..........however THANK YOU

  • @IaKhanic
    @IaKhanic7 жыл бұрын

    This may be dumb, but at 14:23 how did you get that? I understand that you found Curl of F but where did you get the ds from? thanks :P

  • @smrtfasizmu6161
    @smrtfasizmu61613 жыл бұрын

    How did she get from (Pi + Qj + Rk) dS to the -P(dg/dx)-Q(dg/dy) + RdA What's that formula and how can I derive it?

  • @mahtabm8611
    @mahtabm86114 жыл бұрын

    in the 2nd example, why did you choose the shadow of the surface on the xy plane? Is the transformation from surface S to D valid in every question?

  • @neilsarma4722
    @neilsarma47227 жыл бұрын

    Thanks for making us understanding easily. 😊

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    :D

  • @user-fm9gr6jb6e
    @user-fm9gr6jb6e5 жыл бұрын

    18:40 I got -pi/2 when i switch to polar coordinates. Is that correct?

  • @timothyobaob3624
    @timothyobaob36244 жыл бұрын

    At 5:07, let's say that it wasn't necessarily bound by z=0, but rather some positive constant, let's say 1. would that change the r(t) function to ?

  • @salmanaslam1932
    @salmanaslam19326 жыл бұрын

    thnks a lot krista!!!!!!!

  • @kristakingmath

    @kristakingmath

    6 жыл бұрын

    😊

  • @katherine4386
    @katherine43866 жыл бұрын

    Thank you, this helped me master stokes theorem

  • @kristakingmath

    @kristakingmath

    6 жыл бұрын

    Awesome! Glad it could help.

  • @victorcarvalho2758
    @victorcarvalho27584 жыл бұрын

    On the second example when calculating the CURL why do you subtract the j matrix? The formula is supposed to add all 3 matrix

  • @tinanashe8814
    @tinanashe88145 жыл бұрын

    Krista King you are awesome

  • @ulisesfalmonte2496
    @ulisesfalmonte24964 жыл бұрын

    when do we use -P(dG/dX)-Q(dG/dX)+K dA? is it when we have to use the shadow of the plane onto the xy-plane, because dA represents a flat surface? can we also use it to find cult F*dS ?

  • @rickrocks3000
    @rickrocks30007 жыл бұрын

    This is perfect timing, I have a final tomorrow with Stokes on it.

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    Good luck on the final!

  • @usmanraoof6
    @usmanraoof67 жыл бұрын

    this is so helpful for me Krista King

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    Awesome! Thanks for letting me know.

  • @saivenkatdurgaprasad2117

    @saivenkatdurgaprasad2117

    7 жыл бұрын

    Krista King

  • @europeankid98
    @europeankid986 жыл бұрын

    So at 18:20, are we trying to get the double integral in sole terms of dA? And if we can't, would we just integrate with dx and dy like usual?

  • @user-fm9gr6jb6e

    @user-fm9gr6jb6e

    5 жыл бұрын

    I was thinking the same case with x going from 0 to 1 and the same for y->0 to 1. but i end up with -2 not -1

  • @nnass262
    @nnass2623 жыл бұрын

    Thanks for the great explanation, you have all my respect this seems easy as hell copared to the mess we learned. Aren't we supposed to use Ds in stokes theorem like DSx= (dy dz ) i when working on the right side

  • @mohammedmuala7087
    @mohammedmuala70876 жыл бұрын

    Thanks krista Iove from IRAQ :)

  • @9wyn
    @9wyn5 жыл бұрын

    Thank you 🙏

  • @naxishzain6322
    @naxishzain63227 жыл бұрын

    it really too good explanation ...thanks krista:-)

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    Thanks!

  • @osamaalmansari
    @osamaalmansari7 жыл бұрын

    I swear to god I just wanna ask you to do stokes theorem .. you are my hero krista, thanks !!

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    :D

  • @chasemckinley2
    @chasemckinley23 жыл бұрын

    Extremely helpful video. I'm still a bit unclear as to the curl of F dotted with ds being written as -Pdg/dx-Qdg/dy+R...Does that always apply when calculating a dot product between ds and curl F? Either way the video gave MUCH needed insight that several other sources seemed to lack for me so THANK YOU!

  • @briandwi2504

    @briandwi2504

    Жыл бұрын

    Yes, I didn't like that part either. It wasn't clear what was going on. Best keep it as the dot product as you suggest.

  • @alonsog1799
    @alonsog17993 жыл бұрын

    Dope video!

  • @kristakingmath

    @kristakingmath

    3 жыл бұрын

    Thanks, Alonso! :)

  • @jadel.8450
    @jadel.84504 жыл бұрын

    In example 2, why is it negative p and q but positive r?

  • @obsidiantechz1371
    @obsidiantechz13714 жыл бұрын

    please explain verify part of 10:19 . How to solve LHS curlf.n.ds

  • @user-sm6fv6kw7h
    @user-sm6fv6kw7h Жыл бұрын

    Perfect!

  • @aydudie
    @aydudie5 жыл бұрын

    omg u saved my life my calc III final is in an hour thank youuuuu

  • @kristakingmath

    @kristakingmath

    5 жыл бұрын

    Glad it helped, and hope the Calc III final went GREAT! :D

  • @victorkiria686
    @victorkiria6863 жыл бұрын

    Thanks , love you so much....

  • @kristakingmath

    @kristakingmath

    3 жыл бұрын

    You're welcome, victor!

  • @mathlover2299
    @mathlover22997 жыл бұрын

    Do you have any diff EQ material? If not do you have a good source? KZread or otherwise? PS you def helped me get straight A's though Calc and for that I am very thankful (never had a test less than 95% because of all the examples you have)

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    Awesome, I'm so glad I was able to help! I have some DE stuff, here: kzread.info/head/PLJ8OrXpbC-BO2zEW58TpHHakh5nodn3-i It's not a complete course, but maybe some of the videos in there will be helpful. :D

  • @joefuentes2977
    @joefuentes29773 жыл бұрын

    Do a series on differential forms!!!! :D

  • @Caarve
    @Caarve7 жыл бұрын

    Great video! I wish you also had one on the Divergence Theorem.

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    I have one already in my school that I just haven't published to KZread. Hopefully soon!

  • @Caarve

    @Caarve

    7 жыл бұрын

    Had my Calc 3 final last night!! Anyways, thanks for making all the videos. They have really helped me a lot!

  • @kristakingmath

    @kristakingmath

    7 жыл бұрын

    You're welcome, and congratulations on being DONE!!! :D

  • @humayun007
    @humayun0077 жыл бұрын

    Why did you took dg/dx and dg/dy? what's the logic behind it?

  • @ivangushkov3651

    @ivangushkov3651

    5 жыл бұрын

    The logic behind it, is that dS is NdA, where N is a normal vector given as (-dz/dx, -dz/dy, 1) (this comes from a cross product between two other vectors, but don´t worry about it just use it). When you dot the curl with that normal vector you get the answer she showed, it´s just that she skipped over that step.

  • @corey333p

    @corey333p

    5 жыл бұрын

    I wish she would have explained this too.

  • @jadel.8450

    @jadel.8450

    4 жыл бұрын

    @@ivangushkov3651 which two vectors are you talking about?

  • @ivangushkov3651

    @ivangushkov3651

    4 жыл бұрын

    @@jadel.8450 long story. Doesnt really matter. Just use it :)

  • @dominicj7977

    @dominicj7977

    4 жыл бұрын

    @@ivangushkov3651 But don't we need to normalise the unit vector by dividing with magnitude?

  • @yurii6080
    @yurii60803 жыл бұрын

    Online lectures: Following lecture => Confusion => KZread math channels => Enlightenment