Masses on incline system problem | Forces and Newton's laws of motion | Physics | Khan Academy

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  • เผยแพร่เมื่อ 23 ธ.ค. 2024

ความคิดเห็น • 30

  • @airicsnider7572
    @airicsnider7572 7 ปีที่แล้ว +6

    Fuck why don't they teach it like this in school?

  • @reydexterlopez2278
    @reydexterlopez2278 3 ปีที่แล้ว +1

    This is what I'm looking. Hope this help me

  • @abdulazim7211
    @abdulazim7211 4 ปีที่แล้ว +1

    what will be the answer if mass intechange betwwen them, i mean heavy one keep in inclination, pls know me soon

  • @oak6677
    @oak6677 4 ปีที่แล้ว +1

    These videos are soo underrated.... people please hit the like button!!

  • @ssjdashti
    @ssjdashti 6 ปีที่แล้ว +5

    Just tried doing this same exact method with a problem from my physics text book and this method did not result in the correct answer that the book got...

  • @zenoramohammed7860
    @zenoramohammed7860 6 ปีที่แล้ว +1

    So the acceleration of the 9kg and 4kg blocks are the same? ie the acceleration of the 4kg block is 4.75m/s and is positive since it is moving up the inclined plane if needed to be used to calculate internal forces such as Tension like you did with the 9kg block?

    • @bertyalbert2603
      @bertyalbert2603 2 ปีที่แล้ว

      yes they’re the same because both are connected with unstretchable rope (both blocks act as one system)

  • @jimenamargalef8262
    @jimenamargalef8262 6 ปีที่แล้ว +1

    Thank you so much!

  • @CodfishT30
    @CodfishT30 5 ปีที่แล้ว +36

    Everyone's here because they're going to fail the physics test tomorrow

    • @beneng2626
      @beneng2626 3 ปีที่แล้ว

      why you gotta call me out like that

    • @nimrat_b
      @nimrat_b 3 ปีที่แล้ว

      @@beneng2626 nah literally 💀

  • @icanc0
    @icanc0 4 ปีที่แล้ว +2

    anyone else watching this video an hour before the quiz?

  • @ebrahimessack8056
    @ebrahimessack8056 6 ปีที่แล้ว +1

    Hi
    I have the same problem, but the next question, the hanging block is submerged in water, calculate the new tension and acceleration? Please help. I’m not given the density or volume of the second block, only the mass. The block on the incline volume is 8cm^3.

    • @dianchoiriah4919
      @dianchoiriah4919 4 ปีที่แล้ว

      in water the block weight would reduce slightly, ( the density of water is usually constant, around 1000kg/ m3) but u need to know the volume for the submerged block

  • @aafrinmuaazah3863
    @aafrinmuaazah3863 5 ปีที่แล้ว +3

    wait....isnt the tension supposed to be considered?

  • @irinabains4300
    @irinabains4300 3 ปีที่แล้ว

    shouldn't it be mgcos theta instead of mgsin theta?

    • @drofeng
      @drofeng 3 ปีที่แล้ว +1

      mgsin(theta) in the direction parallel to the plane. This can be visualised by drawing a free body diagram. See this worked example th-cam.com/video/ZpL5BIUUmr0/w-d-xo.html

  • @justafan8423
    @justafan8423 5 ปีที่แล้ว

    what if the two masses were switched? how could we assume which direction the system would accelerate in?

    • @alisonho3724
      @alisonho3724 5 ปีที่แล้ว +3

      intuitively the system would go in the direction of the heavier mass

    • @dianchoiriah4919
      @dianchoiriah4919 4 ปีที่แล้ว +1

      it ussually follows the bigger mass bcs the friction wont mean too much

    • @zhouwenli
      @zhouwenli ปีที่แล้ว

      ​@@dianchoiriah4919slope. Imagine that 4kg object placed on a super steep surface

  • @Benjamanic
    @Benjamanic 2 ปีที่แล้ว

    I'm sure that this is not relevant to the question you're answering, but I'm not sure how to even google my question without spending an inordinate amount of time sifting through information that doesn't directly address my question. My question is regarding the line perpendicular to the floor: Let's say I lean an object with a mass of x against a wall. A piece of plywood or whatever. It is leaning against the wall at an 85 degree angle relative to the floor, a 5 degree angle in terms of the triangle it creates at the point of contact with the wall. How much force is placed on the wall relative to mass x? I'm leaning a lot of boards against a wall and I need to know how much of a load that wall needs to be able to withstand.

  • @minecraftnation9940
    @minecraftnation9940 7 ปีที่แล้ว

    How’d it get 45.5? I’ve tried getting t by itself and I’ve gotten every answer but that one

    • @fzx4868
      @fzx4868 3 ปีที่แล้ว

      YES, HOW?

  • @coreyrenner6516
    @coreyrenner6516 8 วันที่ผ่านมา

    why dont you use -9.8? you use +9.8.

  • @Tibb3rsSeptim
    @Tibb3rsSeptim 6 ปีที่แล้ว +1

    my nigga

  • @divyanshumehta9229
    @divyanshumehta9229 8 ปีที่แล้ว

    Wont The Acceleration be 13.74 m/sec^(2)