Law of conservation of energy | Work and energy | AP Physics 1 | Khan Academy

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Sal discusses how energy can't be created or destroyed in an isolated system, and works an example of how energy is transformed when a ball falls toward the Earth.
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AP Physics 1 on Khan Academy: Meet one of our writers for AP¨_ Physics, Sean. A physics teacher for seven years, Sean has taught AP¨_ Physics 1, AP¨_ Physics C, and Conceptual Physics. HeÕs also a former mechanical engineer. Sean is based in Boise, Idaho, and is a Khan Academy physics fellow, creating awesome new exercises and articles for AP¨_ Physics.
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Пікірлер: 117

  • @FF-er5ef
    @FF-er5ef6 жыл бұрын

    Came for the fortnite thumbnail, stayed for the law of conservation of energy.

  • @naveenakumari5459

    @naveenakumari5459

    6 жыл бұрын

    F F good for you man👍

  • @great4ever845

    @great4ever845

    Жыл бұрын

    Does this mean earth will burn up eventually?

  • @jambeary
    @jambeary5 жыл бұрын

    99.9% of the comments here are about FORTNITE I guess im the only .1% about learning this but not for Fortnite Like literally

  • @heyitswolfz6695
    @heyitswolfz66956 жыл бұрын

    Heads up your thumbnail is fortnite might wanna change that

  • @angelmartin-brown6218

    @angelmartin-brown6218

    6 жыл бұрын

    MF WOLFZ clickbait??

  • @buffplums
    @buffplums5 жыл бұрын

    That was a really useful and informative presentation. Thank you

  • @goat5249
    @goat52494 жыл бұрын

    "I've drawn the Earth here: this kind of grass flat thing." Hmm...

  • @tmerkury2813
    @tmerkury28136 жыл бұрын

    Mouahahaha u all got fooled. Including myself

  • @ratulsarker2924

    @ratulsarker2924

    6 жыл бұрын

    TMerkury u

  • @ask-wj2pf

    @ask-wj2pf

    6 жыл бұрын

    TMerkury he he

  • @DerHistoryMeister

    @DerHistoryMeister

    6 жыл бұрын

    Nice. xD

  • @Kookakoolio

    @Kookakoolio

    4 жыл бұрын

    How? I wasn't fooled

  • @NielsenSam7
    @NielsenSam76 жыл бұрын

    2:43 Sal confirms the Earth is flat.

  • @ankitaaarya
    @ankitaaarya2 жыл бұрын

    Thanks for this lecture on khan-servation of energy. 😝

  • @shreyashkashyap4020
    @shreyashkashyap40204 жыл бұрын

    Thank u Khan Academy that was really very useful😃

  • @WesleyHoy
    @WesleyHoy Жыл бұрын

    Thank you Sal!

  • @bureaucrawcy
    @bureaucrawcy3 жыл бұрын

    "Get excited" I wish i could sir☺️

  • @DanielHorton-oz6rp
    @DanielHorton-oz6rp3 жыл бұрын

    I would say more importantly the laws of conservation. There are many but more importantly there is one on its way that is most important. The conservation of quantum information it's the most important because it is overarching above all other laws of conservation. It literally means all things are neither created or destroyed only transferred or transformed.

  • @andygeorgebarber
    @andygeorgebarber Жыл бұрын

    Very well said

  • @TheLevano22
    @TheLevano226 жыл бұрын

    Clickbait

  • @chroma9848
    @chroma98486 жыл бұрын

    The ball hits the air particles as it falls down. What do you call the energy that moves those air particles as it hits them?

  • @AlxndrHQ

    @AlxndrHQ

    2 жыл бұрын

    Wouldn’t it be thermal energy? Since the friction causes heat

  • @GladG
    @GladG6 жыл бұрын

    Love the thumbnail!

  • @user-mk4jq7uq9c
    @user-mk4jq7uq9c6 жыл бұрын

    Fornite thumbnail

  • @JustinOdisho
    @JustinOdisho6 жыл бұрын

    Who else wants to see a khan breakdown of Fortnite

  • @OkKhaos

    @OkKhaos

    4 жыл бұрын

    It's actually funny to see a KZreadr I watch often, comment on a video I'm supposed to watch for school.

  • @Unfamiliar155
    @Unfamiliar155 Жыл бұрын

    No offense!!✌️ that you are brilliant among all👏💕

  • @slump6982
    @slump69826 жыл бұрын

    Lol wow even Kahn academy is tryna get in on the Fortnite craze 🤣

  • @MrFTW733
    @MrFTW7336 жыл бұрын

    Fortnite thumbnail to get those clicks. Well played.

  • @LiiChinHo
    @LiiChinHo6 жыл бұрын

    The law of conservative of energy states that opening a fortnite thumbnail requires watching the ensuing video till the end.

  • @christophermeyers1
    @christophermeyers14 жыл бұрын

    Love you Sal

  • @noyou5865
    @noyou58656 жыл бұрын

    The thing I least expected as a thumbnail

  • @jessehudson1611
    @jessehudson16114 жыл бұрын

    what software is he using for the video???

  • @aadityaanand2339

    @aadityaanand2339

    2 жыл бұрын

    Khan Academy does not hide anything from their audience. If you pawn through the website, they have mentioned the software used by Khan Academy to create videos. They are- Camtasia Recorder/Studio ($200), ScreenVideoRecorder ($20), SmoothDraw 3 (Free), Microsoft Paint (Free) and Wacom Bamboo Tablet ($80).

  • @kay12345
    @kay123456 жыл бұрын

    The only acceptable video type that I accept clickbait. Knowledge

  • @tartitagameplays6381
    @tartitagameplays63812 жыл бұрын

    I need the abstract of the video., please, I need it

  • @555_.kaitlyn
    @555_.kaitlyn2 жыл бұрын

    My teacher gave us this worksheet for homework without teaching it-

  • @haileyjellman5740

    @haileyjellman5740

    2 жыл бұрын

    me too i’m trying to do my hw😭😭

  • @user-uo5br3mi8z
    @user-uo5br3mi8z2 ай бұрын

    "Let me draw my ball" - KHAN ACADEMY

  • @whalesoup8914
    @whalesoup89146 жыл бұрын

    Umm the thumbnail?

  • @AllDayFinesse
    @AllDayFinesse6 жыл бұрын

    Not even mad at the faux thumbnail. I just learned and I’m never mad at that😂

  • @chan-hm7pv
    @chan-hm7pv6 жыл бұрын

    *why am I watching this* Roses are red violets are blue I got clickbaited and so did you.

  • @isl369
    @isl369Ай бұрын

    how do this law and zero exist. you said in the real world there will always be thermal energy

  • @jubanvidoes347
    @jubanvidoes3472 ай бұрын

    ❤❤❤

  • @asherasher9249
    @asherasher92496 жыл бұрын

    can I have a gameplay channel? play cool math games and such

  • @radinelaj3932
    @radinelaj39323 жыл бұрын

    A debate for the law of conservation of mass/ energy ,I watched a video about these laws in you tube and I asked to him : Hello professor , can I ask you a simple question : imagine if you put a quantity( amount) of water in a glass ( simple glass) , can you put this water in another glass ( I mean : to the extent of 100% of quantity of water ) , can you carry this amount of water( 100% of amount) in another glass ( to put all quantity of water in another glass( without losing any drop or molecule of water during the transportation) , can you do that ? I think If you would try it you wouldn't, if you do that then your law( or equation) would be correct. Same thing happens when water condenses, is impossible to transport( to be transported)all amount of water ( all molecules) during the cycle of condensation,( during the rain formation ),it mean : the matter is losing during the cycles verify the physics pls, Someone reply to me : You need to distinguish between water being left behind and disappearing completely. As you transfer water from one glass to another you leave some behind so the original glass is wet , none of the water actually "dissapears"- matter is conserved . Same with the water cycle,, some water evaporates from the sea, but most remain as sea, some condenses as clouds, but some will remain as vapor ( gas) , some of the cloud will fall as rain but some remains as cloud- and so on. It's all there all the time Another ( someone) replied to me : That's incredible difficult, but you should know that the water you put in the glass will not go away. All of the contents in the first glass of water cannot be destroyed and the water cannot create any more water. It may change state( physically to ice or water vapour) but none of it will vanish, so technically it is possible to do this transfer a, and the law of conservation of mass is still correct. My rocket 🚀 reply was : My intention was to say : after a cycle the matter isn't turning back( at the extent of 100% )( all quantity, all molecules ,) By the way that is happening to the energy too, not only the matter is not turning back,but even the energy isn't turning back too ( as the matter isn't turning back too, so even the law of conservation of energy is not correct, These laws are atheists's laws, they are trying to say : we are eternal ,but that is not true. We're losing, friend ,matter is losing ,energy is losing,( everything is disappearing vanishing ,is losing) Were separating from energy,that is my law, Question : why energy is separating from the matter ? For example : sun is losing energy( heat or light ) where is going this energy ?! Are you saying : the energy will turn back ,it will conserve back into the matter ?; I doubt on it When I say : energy is losing I mean : is disappearing( vanishing) from our dimension ( our world) I can say another thing : if you transfer an amount of energy to another object ( from a battery to another) ,this energy will lose ( vanish ,disappear) anyway ,even you can transfer all energy ( all enectrons ,all atoms) ,it will lose (vanish) again ,or disappear( by casuality, spontaneously) The meaning is : you( all of you ) can conserve nothing ,nothing can be conserved ,that is my law, For example : if you transfer energy from a battery to another battery ( from a power bank to a phone), the phone will lose its energy after four(teen) days ( even if you wouldn't use it ), with other words : energy will separate from matter( from battery), like the sun 's energy,it is separating from it( the sun). Everything is separating ,that's my law. I have made a post in f book about this case ,against atheists ,with simply words the point is : the matter and energy are joined together,question is : who joined them ( it) ?! For example : sun ,sun is made by energy and matter , the sun is losing energy ( heat , light ) , it mean : it was made by two things : energy and matter ,it was joined together ,question is : who joined together them ? There were a high intelligence energy who joined( welded ) them ,( God)

  • @cheezywizard5292
    @cheezywizard52926 жыл бұрын

    Does this have a forty thumbnail for anyone else?

  • @cloroxbleach5105

    @cloroxbleach5105

    6 жыл бұрын

    CheezGaming ye

  • @andyman261
    @andyman2616 жыл бұрын

    Lesson is, if you wanna win your first fortnite game, you must always remember; energy is conserved.

  • @treetheory8465
    @treetheory84656 жыл бұрын

    Listen my bro. Your videos are amazing and incredibly educational. However, i would not recommend putting fortnite in the thumbnail. It can draw bad press

  • @shubhamgiri5801
    @shubhamgiri58016 жыл бұрын

    It will be a good idea if He teaches Science in a game like #fortnite

  • @arnavnegi2544
    @arnavnegi25446 жыл бұрын

    Fellas, it’s not click bait. They don’t even care about their KZread channel, they have their own website. It’s probably a mistake/ prank by one of their employees.

  • @arrontolan2084
    @arrontolan20846 жыл бұрын

    I don't know if it's localised to region but I did NOT see a Fortnite thumbnail on this video, just a random screenshot of the equations above.

  • @slayqween5027
    @slayqween50275 жыл бұрын

    Am i the only one here that dosnt know about the fornite tumbnail? What ARE U GUYS TALKING ABOUT?

  • @lemonhead9628
    @lemonhead962810 ай бұрын

    How did the big bang happen?

  • @juansotomayor5275
    @juansotomayor52756 жыл бұрын

    We just got bamboozeled

  • @varunbayireddy1774
    @varunbayireddy17746 жыл бұрын

    Can you explain the thumbnail please

  • @evilserpent0740
    @evilserpent07406 жыл бұрын

    Click bait

  • @thechosenkvng3165
    @thechosenkvng31656 жыл бұрын

    Dam Sal lowkey a beast at fortnite looking at the thumbnail he had 7 kills and he was in the top 4.

  • @AznJsn82091
    @AznJsn820916 жыл бұрын

    That thumbnail

  • @tempname8263
    @tempname82636 жыл бұрын

    I can defy the law of conservation of energy, professor! Light's energy decreases as it passes through expanding intergalactic space! Did I do good?

  • @chrisdudleytrumpet
    @chrisdudleytrumpet6 жыл бұрын

    Umm wut thumbnail is that tho

  • @reallifeduh9942
    @reallifeduh99422 жыл бұрын

    I broke this law once.

  • @saltustic
    @saltustic6 жыл бұрын

    First, even tho dont need to watch the vjd

  • @luismartinez7798
    @luismartinez77986 жыл бұрын

    I came for fortnite and I stayed because this is what my current science lessons is on.

  • @AetherKirin
    @AetherKirin6 жыл бұрын

    ...Wrong thumbnail..?

  • @RasheemH
    @RasheemH6 жыл бұрын

    I got excited because I thought he was going to illustrate using Fornite 😔

  • @isaiahnunez1796
    @isaiahnunez17966 жыл бұрын

    You can't complain about the clickbait, because you all fell for it. I'm almost certain that this was a minor experiment that Sal thought to conduct as a way of gauging the viewer demographic. And yet, here we all are, having played into it.

  • @mehularora1813
    @mehularora18136 жыл бұрын

    Finally!

  • @AppleberrySmith
    @AppleberrySmith6 жыл бұрын

    Watch this become a meme

  • @kalyndas2952
    @kalyndas29524 жыл бұрын

    conzervation

  • @jamesh7429
    @jamesh74296 жыл бұрын

    Fortnite?

  • @goodrow9309
    @goodrow93096 жыл бұрын

    hello I love Khan Acadamy

  • @TheseEyesSeeDarknessClearly
    @TheseEyesSeeDarknessClearly6 жыл бұрын

    I didn't finish the video but I expect some kind of fortnite example with that thumbnail. Or was that just click bait?🤔

  • @brandonchavarria9787
    @brandonchavarria97876 жыл бұрын

    fortnite?

  • @AbrahamsYTC
    @AbrahamsYTC6 жыл бұрын

    Boo! Thought you would be a spicy PUBG boi, Sal.

  • @matthewstevens340
    @matthewstevens3406 жыл бұрын

    I thought how tf could you explain this with fortnite. I got fooled. Would be pretty cool though

  • @RyciaCaminero
    @RyciaCaminero3 жыл бұрын

    🤔

  • @katelynndavis2954
    @katelynndavis29546 жыл бұрын

    clickbait!! :( 😂

  • @tikobeeco
    @tikobeeco6 жыл бұрын

    This is clickbait it has a Fortnite thumbnail... JK but why khan

  • @lapisliozuli4861
    @lapisliozuli48616 жыл бұрын

    Thought this was penguinz0 for a moment

  • @notneb4209
    @notneb42096 жыл бұрын

    Wow fortnite

  • @frostfueledraptor7978
    @frostfueledraptor79786 жыл бұрын

    The clickbait is real

  • @trentmurphy7231
    @trentmurphy72316 жыл бұрын

    I saw this in my feed while high and had to come to the comments to make sure I wasn’t imagining the thumbnail

  • @jeffreygong1101
    @jeffreygong11016 жыл бұрын

    I came in for conservation of energy, now I’m downloading fortnite

  • @jeffreygong1101

    @jeffreygong1101

    6 жыл бұрын

    Goodbye grades

  • @wando2x758
    @wando2x7586 жыл бұрын

    Lol

  • @ratnakarsingh6757
    @ratnakarsingh67576 жыл бұрын

    Sal is using evil means fir a good cause. Usin clickbait for education.

  • @cloroxbleach
    @cloroxbleach6 жыл бұрын

    did u get the victory royale tho

  • @user-qp3hd6tm2n

    @user-qp3hd6tm2n

    4 жыл бұрын

    Yo elso your wet

  • @illadelphh7928
    @illadelphh79286 жыл бұрын

    fortnite u good fam lol

  • @chaoticmidnight1783
    @chaoticmidnight17836 жыл бұрын

    Uhm guys? Wrong thumbnail hahaha

  • @TheGeoscout
    @TheGeoscout6 жыл бұрын

    Even khan academy is clickbaiting us, smh

  • @nepaliangusyoung687
    @nepaliangusyoung6873 жыл бұрын

    z.o.g astro cor

  • @ThoughtCollection
    @ThoughtCollection6 жыл бұрын

    When you need views use a Fort nite thumbnail

  • @real.xplo1t
    @real.xplo1t6 жыл бұрын

    Got trolled y'all

  • @KaneLivesInDeath
    @KaneLivesInDeath3 ай бұрын

    So what I'm getting is this: "The amount of energy the universe was the same yesterday, is the same today, and will be the sane tomorrow."

  • @franciscocaban1410
    @franciscocaban14106 жыл бұрын

    Click Baiy

  • @binai6328
    @binai63285 жыл бұрын

    HELP!!😖😢

  • @dinky7749
    @dinky77493 жыл бұрын

    conZZZZURvation

  • @axelrojas7468
    @axelrojas74686 жыл бұрын

    first

  • @drimthur306

    @drimthur306

    6 жыл бұрын

    Axel Rojas what

  • @axelrojas7468

    @axelrojas7468

    6 жыл бұрын

    Clickbait?

  • @manikbaugh
    @manikbaugh6 жыл бұрын

    I thought this was going to be fornite :(

  • @gabrielgarcia763
    @gabrielgarcia7636 жыл бұрын

    xD fortnite

  • @ayushxrawt
    @ayushxrawt6 жыл бұрын

    Clickbait..😑😑

  • @kangkonggaming23
    @kangkonggaming236 жыл бұрын

    For videos who make fake free energy. 😢

  • @katelynndavis2954
    @katelynndavis29546 жыл бұрын

    someone else obsessed with fortnite?

  • @jonathanarms6287
    @jonathanarms62876 жыл бұрын

    Someone say Fortnite?

  • @toddhowardfan
    @toddhowardfan6 жыл бұрын

    He really just click baited us with fortnite

  • @owurakuboadu
    @owurakuboadu6 жыл бұрын

    Fortnite???

  • @ElNietoPR
    @ElNietoPR6 жыл бұрын

    So, you used a fortnite thumbnail, then switched to a thumbnail of the actual video, then switched it back to fornite?

  • @samvidparajuli4411
    @samvidparajuli44116 жыл бұрын

    For ignorant fortnite players out there.. turn off your pc, save energy 😃☝️

  • @SoumilSahu
    @SoumilSahu6 жыл бұрын

    *IMPORTANT:* The thumbnail is fortnite!! You might wanna change that!!! Edit: It's been changed.