Tension in an accelerating system and pie in the face | Physics | Khan Academy

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  • Опубликовано: 5 сен 2024
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    The second part to the complicated problem. We figure out the tension in the wire connecting the two masses. Then we figure our how much we need to accelerate a pie for it to safely reach a man's face. Created by Sal Khan.
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Комментарии • 73

  • @DuhDuJour
    @DuhDuJour 10 лет назад +132

    where is the first part of the problem?

  • @danielgoober6224
    @danielgoober6224 8 лет назад +41

    I love these lessons, however the lessons are totally out of order. went from tension to suddenly a second part of a problem involving pullies which I haven't even found the first part of yet. Also, please stop skipping operations when manipulating equations. makes it very difficult to figure out what's going on.

  • @koolspaz
    @koolspaz 12 лет назад +5

    where is the previous video that solves the pulley with an inclined plane?

  • @Tackyshot0
    @Tackyshot0 12 лет назад +5

    i wish you would give the links of the previous videos... that would be wonderful!

  • @XxjLuma94Xx
    @XxjLuma94Xx 11 лет назад +10

    Please make the first part not private:/

    • @idaich
      @idaich 5 лет назад +3

      i think its emberrassing

  • @feihuang6136
    @feihuang6136 3 года назад +4

    I cann't tell how much i appreciate your delicate effort for physics, thanks! one question---Where can i find the part 1 of Tension in an accelerating system and pie in the face ?

  • @will8831
    @will8831 13 лет назад +3

    "I am destined to be a great artist" Lol sal you're the best

  • @AmirMullick
    @AmirMullick 11 лет назад +3

    "Well, we knowww...well you dont know this but I KNOW that..." lmfao too funny Sal, love your humor dude

  • @InquiringJoe
    @InquiringJoe 12 лет назад +2

    Where is the video before this???

  • @LaGail4
    @LaGail4 12 лет назад +2

    I love watching your videos but in a rush its difficult to watch a section because the videos aren't number. That would help a ton when I'm just trying to review something like tension. This video started somewhere else but I don't know where. Plus its something you can change just through video editing. I realize you have hundreds of videos but just a thought for the future.

  • @wexarexthexStorm
    @wexarexthexStorm 14 лет назад +3

    "Let's say he has a mustache"
    LOL

  • @pieface1726
    @pieface1726 15 лет назад +1

    this man is getting me through my A-Levels, i love you!

  • @Oocheri
    @Oocheri 12 лет назад

    lol this always happens in my classes. "haha. this is why im a teacher, not an artist... well this is kinda fun... lets make this guy funny lookin"
    and that^ is why i need to come here to relearn the things my teacher is too distracted to teach us

  • @tallentslastname
    @tallentslastname 12 лет назад +1

    i need the first one so bad..but i cant find it haha. so close.

  • @WontonSandwich
    @WontonSandwich 13 лет назад +1

    lets not focus on the drawing *draws hair and mustache
    LOLOL :D

  • @pat6595
    @pat6595 5 лет назад +1

    Khan, where is the first part of the problem?

  • @naircat
    @naircat 13 лет назад +1

    Where is part 1?

  • @applecounty
    @applecounty 12 лет назад

    Thank you from a grateful parent.

  • @nowandforever117
    @nowandforever117 14 лет назад

    Video's are very good. You explain everything. 10/10 for sure! thank you

  • @mackenzyallen515
    @mackenzyallen515 8 лет назад +3

    I'm not sure why you suddenly started using thicker pen font for the last few videos that I've watched, but I find it a lot harder to read..

    • @rolandgao5894
      @rolandgao5894 7 лет назад +3

      It's because those videos are recorded long ago and the resolution is only 240p

  • @KoolioJosh
    @KoolioJosh 12 лет назад

    his was on my physics exam, and i was prepared!

  • @werewolf5
    @werewolf5 12 лет назад

    Please Do Nursing Dosage Calculations, PLEASE. I need your help with this class.

  • @harshinidavuluri878
    @harshinidavuluri878 8 лет назад +1

    the video isn't clear ... but the lecture is;-)

  • @changjin1229
    @changjin1229 11 лет назад

    thank you sal

  • @Phagocytosis
    @Phagocytosis 12 лет назад

    Yeah, especially given the resolution/quality of the lines and such!

    • @jkgan4952
      @jkgan4952 3 года назад +1

      imma comment 8 years later for no reason lol

    • @Phagocytosis
      @Phagocytosis 3 года назад +1

      @@jkgan4952 Lol okay :D I have no idea what this was about. But I guess, have a good one!

    • @jkgan4952
      @jkgan4952 3 года назад +1

      @@Phagocytosis lol you too!

  • @anikoustos2
    @anikoustos2 11 лет назад

    yeah where are the other classical mechanics videos I can't find them on khan's channel.

  • @ZumbaWhit
    @ZumbaWhit 11 лет назад

    That's what I want to know!

  • @kalisadonnah2576
    @kalisadonnah2576 11 лет назад +1

    seriously where is it? and the same others

  • @theonetrueac
    @theonetrueac 13 лет назад

    check the old physics playlist, not sure if it's there, but this looks like an older video...

  • @kalisadonnah2576
    @kalisadonnah2576 11 лет назад

    so helpful

  • @Stretchi3
    @Stretchi3 15 лет назад

    Love your video's, they are very informative!

  • @m1234n1234
    @m1234n1234 13 лет назад

    thankyou

  • @iLLmOfUCaLIVE
    @iLLmOfUCaLIVE 11 лет назад

    are all push forces are normal forces?

  • @anikoustos2
    @anikoustos2 11 лет назад

    where is it indeed?

  • @xlwaiyiplx
    @xlwaiyiplx 15 лет назад

    good artist

  • @mtdeezy
    @mtdeezy 12 лет назад

    Amazing video, but now I want pie!

  • @6bikal6
    @6bikal6 14 лет назад

    ya your drawing is very good
    ..

  • @chuckycheesesbday
    @chuckycheesesbday 15 лет назад

    wouldn't it of been easier to think of gravity as 0.8 or 80% of the force needed. so you go (9.8/80)*100=12.25N

  • @whatitdoes
    @whatitdoes 14 лет назад

    lol,, actually tht's not the exact value of pi cuz pie is an irrational number and it nvr ends. lol
    but try this. write 3.14 in a paper and hold it in front of a mirror.. tht looks like the word "PIE"

  • @qaipak1
    @qaipak1 14 лет назад

    Nice drawing =D

  • @sumfinunique
    @sumfinunique 15 лет назад +1

    il make it bald.. i shouldnt be doing this.. lets give it a moustage.. well anyway.. HAHAHA

  • @GabeRandomVideo
    @GabeRandomVideo 2 года назад

    Take away from the video is Sal was a newspaper cartoonist in his highschool. 4:18

  • @gerrenx7
    @gerrenx7 14 лет назад

    That face is actually pretty good

  • @Sharp12
    @Sharp12 15 лет назад

    OLOLOLO wow this was more funny than it was educational. Well i'd say they are both equal

  • @masteroogway2853
    @masteroogway2853 7 лет назад +2

    This video was made when I turned five

    • @925LY
      @925LY 7 лет назад

      this was made when I turned 13

    • @masteroogway2853
      @masteroogway2853 7 лет назад

      Leo Wilken was it made on your birthday too

    • @idaich
      @idaich 5 лет назад

      you an noob

  • @user-bz7gg6dw9o
    @user-bz7gg6dw9o 5 лет назад

    omg 2008 !!

  • @rishantdutt1946
    @rishantdutt1946 11 лет назад

    great drawing skills up ya sleeves.LOL!!

  • @anikoustos2
    @anikoustos2 11 лет назад

    this link is broken///\\\

  • @luishikawa
    @luishikawa 11 лет назад

    sorry for the delay.. :) /watch?v=KdoBDjvee3U

  • @Fr0gles
    @Fr0gles 12 лет назад

    heres the address for the first part of this video
    watch?v=KdoBDjvee3U

  • @meedan1
    @meedan1 12 лет назад

    shame on you, whoever you are who disliked the vid

  • @PeterMasalski93
    @PeterMasalski93 3 года назад

    The problem with Khan lessons is that
    A) Its not clear
    B) its not in order
    C) He explains almost nothing.
    D) He goes really quickly and he makes mistakes in the process which forces him to make 1min videos to correct his mistakes..
    I don't know why people say that Khan acdemy is so good, its not..

    • @72d
      @72d 2 года назад +1

      Aye man its better than anything you could do. Don't be talking trash if you cant do better lmao 💀

    • @PeterMasalski93
      @PeterMasalski93 2 года назад +1

      @@72d So if I cannot direct a 100million budget film, I should not be allowed to comment or criticize it? poor logic.. You should do the logic course of Khan as well.
      MathTutorDVD much better. Check it out

    • @72d
      @72d 2 года назад

      @@PeterMasalski93 Dude that's just your opinion. and you should not be taking this is one of Sal's OLD video's (I'm talking 8+ years old)
      Of course its not going to be perfect but hey, it still helps people. and that's all that matters. (just scroll though the rest of the comments just because it didnt help you didnt mean it didnt help others.)

    • @PeterMasalski93
      @PeterMasalski93 2 года назад

      @@72d I think you are too thickheaded to understand that comment sections exist for the sole purpose of "GIVING YOUR OPINION". One doesn't need to be an expert or have created similar content to compare and criticize.
      - Get lessons in logic, please
      - I already solved my problem regarding this video.