Newton's Laws: Crash Course Physics #5

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  • Опубликовано: 22 ноя 2024

Комментарии • 2 тыс.

  • @crashcourse
    @crashcourse  Год назад +75

    We made quiz questions to help you review the content in this episode! Find them on the free Crash Course App!
    Download it here for Apple Devices: apple.co/3d4eyZo
    Download it here for Android Devices: bit.ly/3TW06aP

  • @randallpcrittenden
    @randallpcrittenden 8 лет назад +2913

    My favorite explanation of Newtons laws comes from my high school Physics teacher:
    1.) Stuff is hard to shake
    2.) More stuff is harder to shake
    3.) Stuff pushes back

    • @Bloxicorn
      @Bloxicorn 6 лет назад +291

      My science teacher's explanation,(or at least I think she said this I was kinda asleep):
      1.) IYUGVLJGY{YGYV:Gljewdnjqv
      2.) prgwd9f3edwgytyftewdhhhhhhhhhhhhhhhhhhhhhhhgy
      3.) Get out of my friggin classroom

    • @daveforfav7650
      @daveforfav7650 5 лет назад +115

      @@Bloxicorn What ur teacher was probably saying
      1 (explain things )
      2 sees u sleeping says get up Mr or u getting out of my classroom
      3 kicks u out

    • @Bloxicorn
      @Bloxicorn 5 лет назад +52

      I'm a better man 5 months later. I do not sleep. At all.

    • @jerryscanas
      @jerryscanas 5 лет назад +58

      @@Bloxicorn My science teachers explaination
      1.) Your
      2.) Mom
      3.) Gay

    • @swarnalatha5242
      @swarnalatha5242 4 года назад +11

      You are high school and you are learning this now?

  • @undergroundskeptic2916
    @undergroundskeptic2916 8 лет назад +4215

    "Now the normal force isn't like most other forces. It's special."
    so much for normal.

  • @kamalbhamra3146
    @kamalbhamra3146 8 лет назад +13604

    A student in bed will remain in bed until acted upon by a large enough panic : The lesser known Newton's 4th Law.

    • @liawxinyan
      @liawxinyan 8 лет назад +263

      HAHAHA a sense of urgency.

    • @tanyay1073
      @tanyay1073 8 лет назад +229

      +LelWut
      Urgency or a nagging mom 😂

    • @ShamWerks
      @ShamWerks 8 лет назад +87

      +Kamal Bhamra Happy the Student he who like river, can follow his course without leaving his bed.

    • @adrianbornabasic7499
      @adrianbornabasic7499 8 лет назад +14

      +Kamal Bhamra lmao

    • @ASOUE
      @ASOUE 8 лет назад +35

      +Kamal Bhamra I always remind my professors about that one when they mention Newton's laws.

  • @JayTohab
    @JayTohab Год назад +42

    Newton's Laws of Motion:
    0:53 - First Law (Inertia): "An object in motion will remain in motion, and an object at rest will remain at rest, unless acted upon by a force."
    1:37 - Second Law (Fn = ma): "Net force is equal to mass times acceleration."
    3:40 - Third Law (Equilibrium): "For every action, there is an equal but opposite reaction."
    4:52 - Further explanation on Normal Force and Tension Force

  • @VikaS-uk7xg
    @VikaS-uk7xg 6 лет назад +4900

    When your physics final is tomorrow and you tryna learn everything the night before... 😂😂😂

  • @sniperammow4865
    @sniperammow4865 6 лет назад +1346

    Newton slaps top of car. Car slaps newton back. Equal and opposite force!

    • @michelecole4493
      @michelecole4493 6 лет назад +14

      It would also be an unbalanced force

    • @sniperammow4865
      @sniperammow4865 5 лет назад +3

      Isabella Fetter wait what? Ohh I remember!

    • @ddharsh2548
      @ddharsh2548 5 лет назад +16

      I don't think there were cars back then

    • @FlyLeah
      @FlyLeah 5 лет назад +22

      If there wasnt a opposite force the hand would go trough the car:) The pain and sudden stop is feeling of the opposite force

    • @orie315
      @orie315 5 лет назад +8

      @@ddharsh2548 it was a joke. You just got wooooshed

  • @bryanu1737
    @bryanu1737 4 года назад +756

    "There will be no Christmas without physics"
    *Reindeer flies with sleigh*
    (Defies physics)

    • @shivannapv4262
      @shivannapv4262 4 года назад +13

      The the universe cannot be as we know it without Physics.

  • @joshbreesus2781
    @joshbreesus2781 8 лет назад +3452

    Stop scrolling through the comments and actually listen to the dang video

    • @FenrirWolfe1
      @FenrirWolfe1 8 лет назад +37

      I actually know all this stuff... Why am I here again? RUclips, everybody. RUclips....

    • @jogama1059
      @jogama1059 7 лет назад +19

      lol right? this is all common sense if you like legos.

    • @mariyanfernanado9660
      @mariyanfernanado9660 7 лет назад +2

      hiiii darling

    • @0egg0
      @0egg0 7 лет назад +4

      Josh G no.

    • @maximilianmaximus3639
      @maximilianmaximus3639 7 лет назад +28

      caught me

  • @EugeneKhutoryansky
    @EugeneKhutoryansky 8 лет назад +1975

    The arrangement of the Rubik's Cube in this episode is still exactly identical to its arrangement from last episode. Unfortunately, this means that no one is even trying to work on it in between episodes. This just isn't right. Whenever you see an unsolved Rubik's Cube sitting around, fixing it should always be a top priority.

    • @Raylock
      @Raylock 8 лет назад +55

      it's not that hard to solve a Rubik's cube and solvers generally like the unsolved version better than the solved position

    • @feitocomfruta
      @feitocomfruta 8 лет назад +27

      +Pokemonix Aditya The need for order being outweighed by the need for novelty.

    • @Raylock
      @Raylock 8 лет назад +4

      feitocomfruta well Tetris players I cannot help but neglect the cube as it's perfect in its own way perfection is non existing word after all

    • @samaykumar6059
      @samaykumar6059 7 лет назад +11

      I disagree. I always have 2 cubes lying on my desk and if I ever find them unsolved, I rush to it. Can't stand it being scrambled.

    • @jessetorres4319
      @jessetorres4319 7 лет назад +12

      Its probably only their for decoration LOL!

  • @pilar1904
    @pilar1904 8 лет назад +695

    these crash course people are great teachers! much better than the ones in my personal experiences at least...

    • @ГітаЗахир
      @ГітаЗахир 7 лет назад

      Apatheism so true

    • @auroraautumn8764
      @auroraautumn8764 7 лет назад +22

      They don't have to teach behavior, why won't they be better. Try being a teacher for a day in your life and you will have a different perspective.
      I love teaching my content but I can't teach it fun when a bunch of kids are talking, arguing with each other or getting out of their seats which erupts in laughter.
      Once behavior is taught teaching becomes easier.

    • @LearnersNation
      @LearnersNation 6 лет назад +1

      Yeah that's true, but did you understood everything she taught or may you just liked the video presentation? And understood much lesser than compared to real one.

    • @lukast2784
      @lukast2784 6 лет назад +1

      regular teachers can be trash...

    • @pineapplepanda8444
      @pineapplepanda8444 5 лет назад

      Same! there way better than class teaches

  • @babatulani6361
    @babatulani6361 8 лет назад +329

    5:01 just completely clarifies my confusions in physics after 5 years.

    • @omkarchavan5940
      @omkarchavan5940 8 лет назад +2

      👍

    • @ASOUE
      @ASOUE 8 лет назад +19

      +yrjosmiel73 SOOO True, I always wondered why we could move things if everything applies the same amount of force back.

    • @lunacryst2110
      @lunacryst2110 8 лет назад

      +yrjosmiel73 OHHHHHHHHHHHHHHHHHHHH!!!!!

    • @joelchalla9603
      @joelchalla9603 8 лет назад +17

      She's hot

    • @lunacryst2110
      @lunacryst2110 8 лет назад

      ....

  • @feitocomfruta
    @feitocomfruta 8 лет назад +86

    I've gotta say, after watching this series so far, I'm happy they have Dr Somara as the host. Her voice is nice to listen to, and her delivery of the material is engaging. I had to study basic wavelength physics in college for part of my Speech Pathology degree, and I found the course to be a bit dull. I wonder how it will be if and when they discuss it here.

  • @aarongould3538
    @aarongould3538 8 лет назад +823

    I can tell im going to watch this video at least 3 more times

  • @italktoomuch6442
    @italktoomuch6442 8 лет назад +247

    "Suppose you threw a 5kg ball up in the air, and then, you know, got out of the way because that could really hurt if it hits you."
    This is easier to understand than I thought it would be.

  • @itsFisch
    @itsFisch 8 лет назад +1353

    I have this weird habit where I like to watch all these education physics videos after a physic exam....why....

  • @achild5864
    @achild5864 5 лет назад +432

    I was getting it until the elevator thing ...

    • @mr.klunee4103
      @mr.klunee4103 5 лет назад +49

      This really is not a good video for beginners; it moves too quickly to teach anything. For someone like me just watching for fun, sure. But not useful for trying to learn the information. Also the elevator graphic uses colors that make it hard to see the different arrows and stuff they add to it.

    • @ngocminhhan4482
      @ngocminhhan4482 4 года назад +10

      omg same that's why i'm scrolling down here

    • @swarnalatha5242
      @swarnalatha5242 4 года назад +3

      Its basiclly a concept with which you can tell how much your weight will be on the weighing machine,based off of lifts acceleration and direction i know its a long time but hope it helps :)

    • @Sinnbad21
      @Sinnbad21 4 года назад +1

      SWARNA LATHA What always confuses me is that if it takes 15 Newton’s of force to lift an object off the table, how would I actually be able to lift it if the law states that it’s pulling back down with the same force? Wouldn’t it just cancel each other out?

    • @swarnalatha5242
      @swarnalatha5242 4 года назад +1

      @@Sinnbad21 thats where u r getting it wrong. The newtons 3rd law is applivable only for push not for pull.

  • @peekyoin8347
    @peekyoin8347 5 лет назад +142

    I cant focus on the video because of my habit reading the comments while watching😂

  • @DanSolSko
    @DanSolSko 6 лет назад +219

    "And for that we're gonna turn to a physicist you've probably heard of"
    Me: BILL NYE THE SCIE....Oh.

    • @lumeme9352
      @lumeme9352 4 года назад +1

      @Merwin D'Souza I'M CALLING THE FBI PREPARE TO HAVE YOUR VODKA TAKEN!

    • @GlamourCat1920
      @GlamourCat1920 4 года назад +6

      SCIENCE RULES!

  • @Libbyness
    @Libbyness 8 лет назад +195

    I love her accent, not gonna lie. Especially how she says equilibrium :3

  • @andthatsondana
    @andthatsondana 4 года назад +33

    My physics final is tomorrow. Wish me luck, I'm going to need it lmao

  • @lightsier
    @lightsier 8 лет назад +207

    British accents give me joy whenever I hear them, bless the British.

    • @frankschneider6156
      @frankschneider6156 8 лет назад +7

      +lightsier
      Ever experienced Cockney ?

    • @edwardmcdonagh7309
      @edwardmcdonagh7309 8 лет назад +1

      +Frank Schneider or scouse

    • @frankschneider6156
      @frankschneider6156 8 лет назад +1

      Edward McDOnagh
      equally bad ... I'm not even sure if what those natives are talking really qualifies as a language or if it is not rather a combination of grunt louds.

    • @edwardmcdonagh7309
      @edwardmcdonagh7309 8 лет назад

      Loud, strangely high pitched grunts

    • @frankschneider6156
      @frankschneider6156 8 лет назад

      Edward McDOnagh
      Are they also wearing bones in their nose ?

  • @mdewolfe33
    @mdewolfe33 7 лет назад +72

    Have a physics midterm tomorrow. Hopefully these help

  • @rafqatouma7735
    @rafqatouma7735 7 лет назад +124

    Sir Isaac Newton: For every action, there is an equal opposite reaction
    Hamilton fans: *screams in 13 different languages*

    • @satuispunk
      @satuispunk 4 года назад +9

      Thanks to Hamilton our cabinet's fractured into factions..... Hehehehe

  • @AAMEERAHMARIANO
    @AAMEERAHMARIANO 7 лет назад +30

    @CrashCourse I'm loving the Physics course and they are helping me so much. You teach better than in the school I was. I'm watching many times to get every point. Thank you for sharing these knowledges with us.

    • @swarnalatha5242
      @swarnalatha5242 4 года назад

      Sis what she is teaching is 6th grade stuff and if you are watching it again to get every point i am sorry you are just dumb

  • @emmanuelamoh7181
    @emmanuelamoh7181 7 лет назад +22

    1:25, I know this is a serious topic, but I just found it funny.

  • @kaylieherrera9470
    @kaylieherrera9470 6 лет назад +20

    I've learned more in this video than in my physics class all year.

  • @samanthakimball6053
    @samanthakimball6053 4 года назад +372

    when corona makes you watch these videos.

    • @yungsmile7546
      @yungsmile7546 4 года назад +2

      bruh?

    • @aidenschwerdtfeger6104
      @aidenschwerdtfeger6104 4 года назад +15

      Funny thing is that I’m actually here for a class during quarantine so you’re not wrong

    • @jasonvelasco90
      @jasonvelasco90 4 года назад +2

      ​@@aidenschwerdtfeger6104 ditto

    • @Deneirioo
      @Deneirioo 4 года назад +2

      People just want to bring up Corona to bad cus it another way to get alot of likes

    • @badtime6096
      @badtime6096 4 года назад

      @@Deneirioo that's pretty cool my guy!

  • @Lily-mm7dq
    @Lily-mm7dq 4 года назад +5

    How is it that I learn more in the night before a test from a woman I don't personally know than I do from my teacher! Thank you everybody at Crash Course!

  • @gomeezzzzz5213
    @gomeezzzzz5213 4 года назад +5

    I skipped a huge part of my math book that talked about this stuff. when finals came i had to learn EVERYTHING in one night.
    this video helped a lot much love.

    • @swarnalatha5242
      @swarnalatha5242 4 года назад

      So you are saying ur exam was soo trash that a 10 min video could ans everything?

    • @gomeezzzzz5213
      @gomeezzzzz5213 4 года назад +2

      @@swarnalatha5242 yes thats exactly what im saying. and also this video explains it fast and detailed enough

    • @trendteaser9333
      @trendteaser9333 4 года назад

      Why would you skip so much

    • @gomeezzzzz5213
      @gomeezzzzz5213 4 года назад

      @@trendteaser9333 we get too choose what to study first. i skipped the first lesson which was newtons law and kinda forgot about it

    • @trendteaser9333
      @trendteaser9333 4 года назад

      @@gomeezzzzz5213 doesn't the teacher tell everyone the same lesson?

  • @randybaker4675
    @randybaker4675 8 лет назад +14

    Thank you for taking the time to make these videos. I'm having a terrible time with my current professor and this has already helped! Godspeed!

  • @Heavensrun
    @Heavensrun 8 лет назад +184

    Eeeeeh, I have an issue with how you describe the reason that the action and reaction forces don't cancel out.
    It is less about the difference between the sleigh vs the force on the ground and more about the fact that the forces are acting on different objects. Consider an astronaut pushing another astronaut in the depth of space. Each astronaut experiences an equal and opposite force, and there are NO OTHER FORCES acting on them, yet they still accelerate. Why? Because while the forces are equal and opposite, they are acting on _different objects_.
    You can pick up the mug, in spite of the equal and opposite reaction force, because the reaction force isn't acting on the same object. If force 1 is on object A, and force 2 is on object B, the fact that they're equal and opposite is irrelevant. They can't cancel if they're acting on different objects. The action force is object A acting on object B, the reaction is object B acting on object A. Each of these forces is free to induce acceleration on their respective objects.

    • @Iffyish
      @Iffyish 7 лет назад +7

      Jason Heavensrun thank you very much for the explanation

    • @supreetsingh987
      @supreetsingh987 6 лет назад +5

      I don't see how what she said contradicts what she said given that she specified what object each force was acting on. And why would anyone think 2 separate forces acting on 2 objects would effect each other.

    • @burlofreak
      @burlofreak 5 лет назад +6

      that's exactly what she said, except you sound stupid.

    • @wareeshanadeem3940
      @wareeshanadeem3940 4 года назад +1

      Ur words aren't even over in the keypad lady you type so much

    • @qtMure
      @qtMure 4 года назад +1

      Jason Heavensrun thanks for the answers to my physics quiz XD

  • @moneyinfluencer9274
    @moneyinfluencer9274 4 года назад +12

    Her:no Christmas without physics
    Santa: are you sure about that

  • @lejink
    @lejink 8 лет назад +1

    Thanks for the upload!
    I'd like to see more of Shini, her accent is wonderful to listen to, she has a beautiful smile and she holds attention well

  • @muammarssamad5357
    @muammarssamad5357 5 лет назад +18

    5:52
    The teacher says: There would be no Christmas without physics.
    Me: Why he doesn't put a flying reindeer?

  • @petermacdonough9077
    @petermacdonough9077 4 года назад +19

    Thank you for posting this!! I have been studying to get into the Navy and I am on the Physical Science chapter. I have a better understanding by watching things in motion and film, and this video has helped a lot!!! :)

  • @FirstRisingSouI
    @FirstRisingSouI 8 лет назад +25

    The thought bubble about the hockey rink wasn't timed well. It showed constant motion when Shini was talking about acceleration, and stopped the puck when Shini was talking about equilibrium. This might really confuse people who are learning this for the first time.

  • @omkarbhambure7461
    @omkarbhambure7461 8 лет назад +32

    special appearance:professor Feynman!!!

  • @mimipavey
    @mimipavey 6 лет назад +2

    this genuinely might be the only reason i pass physics, thankyou so so much!!

  • @Zanityrey
    @Zanityrey Год назад

    i love these ppl on this channel sm they give me hope in my school life

  • @anitabhandary2902
    @anitabhandary2902 2 года назад +10

    Thanks for being a grade teacher. My irl teacher can’t teach.

  • @maryjames9927
    @maryjames9927 5 лет назад +6

    Gosh i think I learn more in RUclips than my teacher's stuffs thinks that she knows too much while she was fooling us around"LOVE U YOU TUBE TEACHERS"got to understand alot

  • @TylerLauren.
    @TylerLauren. 5 лет назад +7

    The quality of your videos are amazing, and also interesting! Thank you.

  • @liawxinyan
    @liawxinyan 8 лет назад +1

    I like how this is posted for me to revise for my physics test next week. Good timing!

  • @sentoria7702
    @sentoria7702 5 лет назад +1

    thank you so much for making this wonderful video free!!

  • @blmandar
    @blmandar 5 лет назад +22

    Newton's 4th Law of Motion - "A Rubik's cube at unsolved position will continue to be in unsolved position unless it is acted upon by a external effort to change its state of being."

  • @nachannachle2706
    @nachannachle2706 7 лет назад +8

    Most interesting video so far. It's nice to see the notions/concepts build up piece by piece.
    Still, so many ways to describe the same "event" and it's all down to mathematics.

  • @zcrazyg9114
    @zcrazyg9114 5 лет назад +39

    One does not simply "Throw" a 5kg bowling ball...

  • @melz9969
    @melz9969 8 лет назад +1

    yesss her videos are getting so much better! great explaining! great visuals!

    • @TheFireflyGrave
      @TheFireflyGrave 8 лет назад

      Yeah, the first couple were a bit rocky but they've improving the pacing and explanations a lot.

  • @ZulfaAbdallah-lz5lz
    @ZulfaAbdallah-lz5lz 6 лет назад +1

    I just like how she is explaining physics with such a smiling face i start loving phy but my finals r near i should have discover this early

  • @aulid9607
    @aulid9607 8 лет назад +13

    G in Olevels = 10m/s
    G in ALEVELs = 9.81 m/s

  • @RyanTaegan
    @RyanTaegan 8 лет назад +6

    Hey Shini! I'm having my physics exam tomorrow and these videos really help! Keep going! 😊

  • @tdpack2003
    @tdpack2003 8 лет назад +5

    I'm in love with Shini!

  • @xochitlterrazas1149
    @xochitlterrazas1149 4 года назад +1

    Got an Ap Physics Exam today and I decide to watch these the morning of

  • @gabriele7059
    @gabriele7059 5 лет назад

    I forget the whole thing. My rise was approximately at the beginning. What a remarkable creature. So well spoken.

  • @spam_musubi1
    @spam_musubi1 7 лет назад +4

    At 1:23 I was dying of laughter 😂😭 I was watching this in class (everyone) and was the only one that was laughing .

  • @kant12
    @kant12 8 лет назад +4

    It's my first time checking out the physics crash course and Shini does a great job. Some of the other people get a little too hyperactive and confusing. This was perfect.

  • @azlhiacneg
    @azlhiacneg 8 лет назад +18

    Well I was like, "Let me watch some easy physics to procrastinate for this physics exam today". Then I realized how much basic physics I've forgotten... Well now I know why people hate physics so much...

  • @georgiamillar4001
    @georgiamillar4001 4 года назад +2

    No Christmas without physics...I-

  • @brad.bryant
    @brad.bryant 8 лет назад

    these videos are great and all but I really just enjoy listening to her talk

  • @rah9081
    @rah9081 7 лет назад +11

    "There will be no Christmas, without Physics "😄

  • @Iffyish
    @Iffyish 7 лет назад +4

    I love learning in my free time. Thanks for the videos! I'm about to start college, and these videos have definitely helped refresh my memory about what I've learned in high school while keeping me entertained by presenting new additional info.

    • @Iffyish
      @Iffyish 7 лет назад

      I also love the graphics because I learn best visually. Thanks again!

    • @swarnalatha5242
      @swarnalatha5242 4 года назад

      Excuse me? This is taught in 6th grade

    • @Iffyish
      @Iffyish 4 года назад

      @@swarnalatha5242 not in detail where I live.

    • @swarnalatha5242
      @swarnalatha5242 4 года назад +1

      @@Iffyish kk no offence though

    • @Iffyish
      @Iffyish 4 года назад

      @@swarnalatha5242 None taken, lol, schools here aren't great. Once got a bad grade on my trigonometry final in highschool, went back and checked, and some of the test answers were actually wrong. My teacher corrected it after - thankfully, she wasn't the type to outright ignore constructive criticism like some teachers.

  • @coolmansam150
    @coolmansam150 8 лет назад +65

    Crash Course Engineering Next !?!?!?

  • @joshc1394
    @joshc1394 8 лет назад

    I really like watching these before the lecture on the topic.

  • @ellafleck1307
    @ellafleck1307 5 лет назад +2

    Thank you for this video! It helped sooo much, I'm a fifth grader trying to learn the order.

  • @lottiex9597
    @lottiex9597 4 года назад +5

    this was rlly useful I hopefully I will ace my physics force test cause its today

  • @somethingreal5042
    @somethingreal5042 5 лет назад +12

    newtons 3rd law example: a gun fires, there is a recoil

  • @Langschwert25
    @Langschwert25 8 лет назад +11

    "F"ull = "M"etal "A"lchemist

  • @DhanuRadha5
    @DhanuRadha5 6 лет назад

    Feynman Lectures in Physics!!!!! I love it!!!

  • @loaonline
    @loaonline 8 лет назад

    Excellent presentation. Thanks for being more organized and slowing down the talking.

  • @shreshthadavi141
    @shreshthadavi141 8 лет назад +13

    This is wonderful! I was waiting for this for such a long time.. Could you do some videos about electronics and stuff like that? Keep up the good work!

  • @Alverant
    @Alverant 8 лет назад +9

    Remember the PBS show "Mechanical Universe" in the 70s? They also did the moving parts of the equation. But they had little starbursts when factors canceled each other out.

    • @gigijbijbj
      @gigijbijbj 8 лет назад

      80's*

    • @spaceinbetween6591
      @spaceinbetween6591 8 лет назад +1

      Thats such an obscure reference

    • @Alverant
      @Alverant 8 лет назад +1

      +IAintGivinOutMyRealNameOn RUclips Maybe, but it's this series's thematic ancestor. Early computer graphics and demonstrations. I loved it. This lecturer had this huge notebook and you could see the progress he made from beginning to end.

    • @rowandoescovers
      @rowandoescovers 4 года назад

      glleg

  • @Araj213
    @Araj213 Год назад +3

    Newtons 4th law of motion: every book will be covered in dust unless and until and exteral exam acts on it😂😂

  • @hiddeninsorrow
    @hiddeninsorrow 5 лет назад

    She's so good at what she does. Could listen to her forever

  • @somenerdyblonde
    @somenerdyblonde 7 лет назад +1

    Okay, this is the first explanation of normal force that makes sense to me. Thank you!

  • @legitgopnik8431
    @legitgopnik8431 8 лет назад +3

    This video cleared up a lot of things for me! Thank you for making this show!

  • @Cacciato
    @Cacciato 7 лет назад +7

    At 8:23, isn't the force of tension the same as the force of gravity on the counterweight ?
    I mean Ft = m(c).g
    It's Just the only thing that i don't understand.

  • @no._.873
    @no._.873 4 года назад +9

    I will never forget “Every action has an equal opposite reaction” thanks to Hamilton but at the same time i will never not sing that line.

  • @izabelagziut3083
    @izabelagziut3083 7 лет назад

    Thank you for existing CrashCourse. Thank you.

  • @nafrost2787
    @nafrost2787 6 лет назад

    Who needs notebooks when you have CrashCourse?
    I have a test on this in 4 days but I don't even look at what we have learned in class, I don't need it, I got Shini

  • @otshepengmoloto4946
    @otshepengmoloto4946 6 лет назад +3

    Thank you for being such a great teacher I hope you keep on making greater videos

  • @welog7884
    @welog7884 7 лет назад +5

    There would be no christmas without physics.
    *Holds up a finger*
    ...
    *Slowly pulls it back*

  • @hudsonx3505
    @hudsonx3505 5 лет назад +18

    when you have a science test tomorrow and forgot to study

  • @estebancx7805
    @estebancx7805 6 лет назад +2

    I love this channel, please never stop it..!

  • @guichabanaano27
    @guichabanaano27 4 года назад +1

    My physics finals (matriculation examination) got rescheduled and now they're a week earlier than they were supposed to be because of the CODVID-19 panic. Help me CrashCourse, you're my only hope!

    • @bhawnamehta2261
      @bhawnamehta2261 4 года назад

      Thank god! My class 10th boards are over. Two exams which were optional, got cancelled due to that idiotic disease. Break a leg!!

  • @DinaKubba
    @DinaKubba 8 лет назад +53

    These videos are pretty helpful so far, but the timing was honestly bad, you guys should've started earlier since that the AP Physics exam will be next week.

    • @JoshuaChowabc
      @JoshuaChowabc 8 лет назад +6

      +Dina K. Because of weird American laws, I think taxes influence when seasons on CrashCourse starts and ends

    • @plaiedesct
      @plaiedesct 8 лет назад +5

      +Dina K. You're in serious trouble if u use crash course as ur study guide.

    • @JoshuaBorrow
      @JoshuaBorrow 8 лет назад +10

      +Perseides Why? They often provide an interesting alternative approach that can help people with their understanding. The Astronomy crash course covered concepts last year up to end of undergrad level, just with less mathematics.

    • @DinaKubba
      @DinaKubba 8 лет назад +3

      +Perseides It's definitely not the only resource that I would use for studying and AP course, but it would've been useful when I first started taking the course. I personally like to use simple videos to recap all topics.

    • @JohnnyYenn
      @JohnnyYenn 8 лет назад +1

      I already had my mid term on first year mechanics.
      Would have been helpful like 2-3 months ago.

  • @Jerome...
    @Jerome... 8 лет назад +7

    Elevator > Lift. Elevators change your elevation. Lift should only go upward.

    • @robertstiffler1251
      @robertstiffler1251 8 лет назад +6

      They lift you upward at a negative speed

    • @Schindlabua
      @Schindlabua 8 лет назад +1

      +Mr. Poopybutthole mind = blown

    • @ingridesquilla8664
      @ingridesquilla8664 7 лет назад

      where can I get a lift straight to heaven?

    • @thegaspatthegateway
      @thegaspatthegateway 7 лет назад

      They lift you above the air in the elevator shaft? hehe jk your comment was funny

    • @samrashafaq1717
      @samrashafaq1717 6 лет назад

      Robert Stiffler speed can never be negative

  • @deanwcampbell
    @deanwcampbell 8 лет назад +21

    +CrashCourse
    Great video Chrash; however, I can't wait to see your up-coming video on relativity where we learn that gravity isn't actually a force but the curvature of space-time.

    • @jelmar35
      @jelmar35 8 лет назад +5

      That would probably episode 1000. That's not really basic stuff

    • @carloscerritoslira328
      @carloscerritoslira328 8 лет назад

      +nyyght7 25 episode i guess

    • @mattikeller1781
      @mattikeller1781 8 лет назад +4

      gosh gravity is still a force, its one of the fundamentals, you can describe all other forces as well with curvature, its just very practical to do this for gravity since its the most obvious force on large scales

    • @rath60
      @rath60 8 лет назад +2

      +Richtiger Kevin I was thinking the same thing but I can't really think of what the other forces are curveing

    • @mattikeller1781
      @mattikeller1781 8 лет назад +1

      Jose Hernandez yeah but be honest. Can you really IMAGINE the curvature of spacetime? Its hard right? Because we only see the effects of it.
      But i am not hundert percent sure if the other forces can be described with curvature, but i know that electromagnetic wormholes are possible.

  • @erikziak1249
    @erikziak1249 8 лет назад

    This brings up memories... Nice. Free knowledge.

  • @fridaramoscasas9970
    @fridaramoscasas9970 8 лет назад +1

    Thank you for explaining my entire science chapter❤️❤️❤️👌👌👌👌

  • @itsdalora3006
    @itsdalora3006 7 лет назад +6

    My test is tmrw 😂😂🤣I never studied! I'm lost! Why do I have this class? 😪

  • @GamegisKhan
    @GamegisKhan 8 лет назад +31

    8:32 isnt that Newton's Second law?

    • @cajuniky
      @cajuniky 8 лет назад +6

      Sure is, good catch

    • @cajuniky
      @cajuniky 8 лет назад +3

      +Science Power I didnt notice, because as I watch this, I start spacing out on memories from studying Engineering Haha 😄

    • @swarnalatha5242
      @swarnalatha5242 4 года назад

      @@cajuniky sis this is taught in 6th grade not in engineering atleast speak a beliveable lie

    • @cajuniky
      @cajuniky 4 года назад

      @@swarnalatha5242Lol
      I never said this was only taught in Engineering. These are the basic laws of movement/force. And used to form equations in 3D space with vectors, with advanced calculus, in Static and Dynamic physics in Engineering. What I was saying was, when I see any basic physics, I always think back to these courses. And also Relativity and Quantum physics. Which I dont even think is mandatory to take anymore where Im from, for Civil Eng at the Uni I was at, but that was 12 years ago 🤷‍♀️.. Idk why u assume Im lying 🤦‍♀️

  • @lxcispieces
    @lxcispieces 5 лет назад +3

    I laughed so hard when the lady got hit by that bowling ball😂

  • @ghostly3027
    @ghostly3027 5 лет назад +2

    love these vids, helping me through college one at a time! thanks for all that you folk at crash course do!

  • @hamnahkashif5310
    @hamnahkashif5310 7 лет назад

    most helpful video about newton's 3 laws on youtube :)

  • @davidbarta9512
    @davidbarta9512 5 лет назад +58

    Laws of motion do not work, My crush atracts me but I do not atract her. :)

    • @rashiverma1151
      @rashiverma1151 4 года назад

      😥😥

    • @hegrye
      @hegrye 4 года назад

      Lol

    • @satuispunk
      @satuispunk 4 года назад +4

      Dang, I feel you. Mine said that's she liked girls, but she's not into me and now I'm sad. Why am I writing this? In a physics video of all places 😂

  • @superj1e2z6
    @superj1e2z6 8 лет назад +183

    In before thumbnail.

  • @guidethanakorn3982
    @guidethanakorn3982 4 года назад +12

    When you sleep in class, so you end up watching this at night trying to do homework

  • @thepokemonmaster1907
    @thepokemonmaster1907 6 лет назад +1

    I love crash course and this lady she explained it so well

  • @laurentiusradung
    @laurentiusradung 8 лет назад

    Great you are, for your presentation, Physics Course. Greetings from Denpasar, Bali