Work-energy theorem | Work & Energy | Physics | Khan Academy

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  • Опубліковано 6 січ 2025

КОМЕНТАРІ • 68

  • @darshananath6806
    @darshananath6806 4 роки тому +43

    Words can't explain how much I am grateful to this video. GREAT JOB!!!!!

  • @nileshrathod3153
    @nileshrathod3153 4 роки тому +19

    Excellent explanation. I totally understood it. Earlier I was really confused about it. Thanks a lot!

  • @levisaaronlewis3791
    @levisaaronlewis3791 4 роки тому +51

    I can't understand why this video only has 1 500 views on the time of this comment It's so well explained !

  • @vindunknown
    @vindunknown Рік тому +4

    I swear to god it's always an Indian guy who does it better . Excellent explanation

  • @ManojGoud-t7u
    @ManojGoud-t7u Рік тому

    Since 2k22 I'm following this channel, my total knowledge was gained by the help of this channel i'm very grateful to you . I have changed alot coz of this channel very very big thanks.

  • @suhaniissar2659
    @suhaniissar2659 4 роки тому +3

    It really healped me .... thankyou sir😀

  • @karunasharma9512
    @karunasharma9512 3 роки тому +2

    Sir I was looking for exact explanation 😃 video now I have understood after my school n College Life 🤭
    Thanks a lot sir u deserve a lot of thanks 🙏🙏🙏🙏🙏🙏🙏🙏

  • @rickastleysmicrophone7544
    @rickastleysmicrophone7544 Рік тому +10

    12th grader here! You're such a blessing Mr. Mahesh, this video helped me a lot to clear my doubts

  • @Hino_55
    @Hino_55 4 роки тому +6

    You cleared my confusion Sir Mahesh, Thankyou!

  • @noahdangerio9540
    @noahdangerio9540 2 роки тому +2

    The mathematical explanation for work related to kinetic energy was so easy to understand. Thank you!

  • @Decoratewithbestofficia
    @Decoratewithbestofficia 3 місяці тому

    This video is helpful for me 😊
    Thanx you for making this video

  • @MansiDevrukhkar-uz6cx
    @MansiDevrukhkar-uz6cx 10 місяців тому

    😊Thanks sir,you made this theorem as smooth as butter for me 😊

  • @dakshrajsmindbrainacademyb6606
    @dakshrajsmindbrainacademyb6606 2 роки тому +2

    I love you Sir, Best thing this video helped me get 4 marks in my exam 🤩🤩

  • @aamirhooda937
    @aamirhooda937 7 місяців тому +1

    Such a clear explanation. Thank you bhai

  • @varun2247
    @varun2247 4 роки тому +1

    Loved it mahesh sir you are so awesome physics guru

  • @fastnoob9327
    @fastnoob9327 2 роки тому +4

    The proof why you solved for every equation makes sense than the thing done in my TBK. I am so happy that I got an explanation something like this

  • @Confusedpsyco
    @Confusedpsyco Рік тому

    Learn alot from this video thank you keep it up❤

  • @ashnakamura2411
    @ashnakamura2411 3 роки тому +1

    your explanations are great, please make more videos :) Love from England

  • @priyanshuchauhan3876
    @priyanshuchauhan3876 4 роки тому +2

    A really wonderful explanation thank you sir

  • @letagomabotha9004
    @letagomabotha9004 2 місяці тому

    Wow! So simply explained!

  • @naveedahsan7315
    @naveedahsan7315 4 роки тому +3

    Phenomenal!!!!!!!!!!

  • @theophrastusvonhoenheim4022
    @theophrastusvonhoenheim4022 3 роки тому +3

    how does this only have 200 likes? its an amazing explanation

  • @anything3068
    @anything3068 4 роки тому +9

    why dont they teach so good in schools
    ???
    ???

  • @dorapalaparti1977
    @dorapalaparti1977 Рік тому

    Wonderful explanation sir😊😊😊😊😊😊😊😊😊😊😊.

  • @littleinvention2041
    @littleinvention2041 11 місяців тому

    Sir thank u soooooooo much i can't explain how helpful is this video ❤❤❤❤❤❤

  • @onyourmarksx
    @onyourmarksx Рік тому

    That was so helpful thankss!!

  • @puttetiki
    @puttetiki Рік тому

    Very clear and to the point! Much appreciated! By the way, as a side note, gravity can't push, only pull.

  • @johnkilai1447
    @johnkilai1447 Рік тому

    thaaaaanks well explained be blessed

  • @godwinmakinyiwulimaja
    @godwinmakinyiwulimaja Рік тому

    This man is so good 😊

  • @pragyanjitozahphukon7201
    @pragyanjitozahphukon7201 Рік тому

    I think this video needs more views and likes🥀

  • @bruk1842
    @bruk1842 11 місяців тому +3

    i am confused with the puppy example. you raised the potential energy of the puppy which means you transferred energy to the puppy so how is there no work done blse the definition of work is clearly stated as the amount of energy transferred?

    • @barathbarath8912
      @barathbarath8912 Місяць тому

      i too have the same doubt if you got the ans reply

  • @asmaabashasha2468
    @asmaabashasha2468 3 роки тому +1

    thank you soooooo much!!! i have an exam three days from now and this has helped me immensely :)

    • @amber5208
      @amber5208 3 місяці тому

      I hve one tommorow 😢😢

  • @kareemteniola3634
    @kareemteniola3634 10 місяців тому

    Thank you so much well explained

  • @grahamflowers
    @grahamflowers 2 роки тому +3

    There is no kinetic energy in a moving mass there is force Mv squared, kinetic energy is the energy of consistent work from a consistent force regards Graham Flowers

    • @selenalozada1764
      @selenalozada1764 Рік тому

      I was wondering the same thing. If work is equal to kinetic energy. Then, did he skip a step when creating connection between kinetic energy and work. When kinetic energy is equal to 1/2 m x v^2. I am very confused...

    • @grahamflowers
      @grahamflowers Рік тому

      @@selenalozada1764 Mass is always a constant only velocity changes regards Graham Flowers

  • @bhawanakanwarshekhawat921
    @bhawanakanwarshekhawat921 5 років тому +3

    Superb

  • @gmnahin
    @gmnahin 3 роки тому +1

    Very underrated......

  • @diegomchenry8676
    @diegomchenry8676 2 роки тому +4

    Im confused about the cupboard. work = force x displacement. In the example, a force was applied and there was displacement so how is there no work?

    • @send_help_to_tas2251
      @send_help_to_tas2251 8 місяців тому

      There's work done by you thus making you lose energy, which is then gained by the cupboard but just as quickly removed by friction as it does negative work (probably converted into heat and sound) so there is no kinetic energy left in the cupboard

    • @SocialMedia-y7e
      @SocialMedia-y7e 3 місяці тому

      Because friction acts in opp direction , so total work done is zero

  • @shortsprings
    @shortsprings 8 місяців тому

    The math equation explanation is correct. However, the push cupboard and raise puppy examples need to be broken into two parts: acceleration from rest, and deceleration back to rest. That would be a better explanation.

  • @sydneysands4950
    @sydneysands4950 6 місяців тому

    SO GOOD THANK YOUUUUUUUUU

  • @abbasiareeb
    @abbasiareeb Рік тому

    Great sir

  • @NatnaelDaw-cv9bt
    @NatnaelDaw-cv9bt 4 місяці тому

    Tank you.

  • @Watch.23
    @Watch.23 Рік тому

    Thank you!!!!

  • @saimahaider9956
    @saimahaider9956 8 днів тому

    What about the work energy theorem in a resistive medium ???

  • @ashfauzzamanaronno6606
    @ashfauzzamanaronno6606 3 роки тому +1

    I think explaining the first situations as adding/removing kinetic energy is not appropriate since you can't just add or remove energy. there's actually conversion of energy working behind it.

    • @KhanAcademyIndiaEnglish
      @KhanAcademyIndiaEnglish  3 роки тому +7

      Thanks, I think I should have worded that better!
      You can always add/remove energy from any object. It's just that that energy has to come from/go somewhere. In the case of the video, that energy is coming from/going to my body!

  • @petergoh5628
    @petergoh5628 2 роки тому +1

    For the case of the puppy, isn’t ur work done the gain in gravitational potential energy, mgh? How can it be 0?

    • @drofeng
      @drofeng Рік тому

      The work done by the gravitational force is the negative of the change in potential energy. Hence, the work done by an external agent (you) to move the puppy up against the gravitational field is mgh (the total gained potential energy).
      By moving the puppy up slowly (quasi-static, constant velocity, dynamic equilibrium, neglecting inertial effects) i.e. Fnet=F-mg=0 at all times
      If we are talking about the net work done, the net force (Fnet) on the puppy is always zero, and therefore the net work done (by the external agent + the gravitational force) on the puppy is zero

  • @fusion69
    @fusion69 3 роки тому

    nice video

  • @Acousticguitar-s8j
    @Acousticguitar-s8j Місяць тому

    He sounds exactly like the guy from Floathead physics

  • @AnkitDebnath-fb1jc
    @AnkitDebnath-fb1jc 4 місяці тому

    I can recall Mahesh voice

  • @andy_182
    @andy_182 2 роки тому +1

    KYNETIC energee

  • @vansharora3402
    @vansharora3402 3 роки тому

    In the mathematical equation where did the 2 go
    ??

    • @heyyo96
      @heyyo96 3 роки тому

      It will be mv^2/2-mu^2/2
      Which will be further 1/2×mv^2 - 1/2×mu^2
      Now, W=K.E final -K.E initial

  • @md.shamimreza5535
    @md.shamimreza5535 2 роки тому +1

    Good explanation but there are some misconceptions too!!!

  • @ryancantu9437
    @ryancantu9437 3 роки тому

    how do i get songs out of my head

    • @amber5208
      @amber5208 3 місяці тому

      Seriously😂😂😭like howwww