Super hot tension | Forces and Newton's laws of motion | Physics | Khan Academy

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Khan Academy

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@Celicaw8
@Celicaw8 8 жыл бұрын
I honestly had to look up David in google just to see who he is because of how good a teacher I think he is, thanks again for the clear explanation of the subject!!!
@nirmitbatavia8192
@nirmitbatavia8192 7 жыл бұрын
Érchegyi Dávid just it is the problem of pepper
@liyemamthini6638
@liyemamthini6638 5 жыл бұрын
David David David,you are the definition of a hella cool teacher
@aimbotbob5056
@aimbotbob5056 7 жыл бұрын
I love this guy idk y tho
@odeleyee
@odeleyee 8 жыл бұрын
that was beautiful
@virupannamedikinal
@virupannamedikinal Жыл бұрын
Thank you so much,finally got it
@crisen_
@crisen_ 4 жыл бұрын
It made me laugh when he said .. "we will get there I promised."
@endless782
@endless782 3 жыл бұрын
Thank you so much khan academy!
@amalguys1741
@amalguys1741 7 жыл бұрын
That great. Thanks you for this video
@herrschultz7413
@herrschultz7413 8 жыл бұрын
This was... Amazing
@nirmitbatavia8192
@nirmitbatavia8192 7 жыл бұрын
u r awesome man
@charlieevergreen3514
@charlieevergreen3514 8 жыл бұрын
David, I followed your steps, but am confused about the results not equaling 30N... 15N + 15 root3 N = 30N ? Where am I mistaken? (Also, sorry that I don't know how to type "root3" in proper symbols.) Thank you for these generous and skillful lessons!
@martinfederico7269
@martinfederico7269 8 жыл бұрын
Charlie Evergreen same here, i don't know, I got T2=33.8 aprox. And that does add up... they should give some answer .@khanacademyphysics
@charlieevergreen3514
@charlieevergreen3514 8 жыл бұрын
+Martin Federico I just re-watched this and realized that I was expecting the ropes' tensions to equal 30N, but that's not right; they would have more than that, because they are not perfectly vertical, so they have vertical AND horizontal tension. That's where the confusion was for me; the answer is supposed to be higher than 30N, as you found, too.
@woodychelton5590
@woodychelton5590 2 жыл бұрын
@@charlieevergreen3514 yeah i struggled with this a lot. it doesn't seem intuitive that the two ropes tensions summed aren't equal to the blocks downforce in newtons. But in reality it's only the VERTICAL components that sum up to that. I think this has some interesting applications for how to multiply force to do more than what it would seem it could initially.
@danielepalmones6426
@danielepalmones6426 7 жыл бұрын
Whoa you can actually do that? Multiply a denominator to a side of the equations that's zero to remove it?
@alpacinomerbah
@alpacinomerbah 7 жыл бұрын
welcome to math
@JonLG490
@JonLG490 6 жыл бұрын
@@alpacinomerbah lmaoo shiiiii
@peaches4free
@peaches4free 7 жыл бұрын
Isn't it the net force that is equal to zero, rather than a=0? I would have done mg=T1 + T2.
@kingplunger1
@kingplunger1 4 жыл бұрын
no
@jadanrakik7757
@jadanrakik7757 4 жыл бұрын
hey reverse it and get t1y and t2y i dont think it adds up to 30N...
@skeche
@skeche 7 жыл бұрын
I want some hot peppers now
@pantherplat3763
@pantherplat3763 5 жыл бұрын
now tell me the acceleration of the can and in which direction
@dianchoiriah4919
@dianchoiriah4919 4 жыл бұрын
the force is balanced so there'll be no acceleration tho
@woodychelton5590
@woodychelton5590 2 жыл бұрын
no acceleration boss
@chiman3778
@chiman3778 7 жыл бұрын
Why can't you just do T1=30sin(30) and T2=30Sin(60)?
@gam701
@gam701 7 жыл бұрын
That's what I was wondering because in the previous video they used the Force of weight as the y component for the ropes in the chalk board problem
@timothymiceli
@timothymiceli 7 жыл бұрын
because if you do it that way then you're saying that the vertical component of each rope is equal to the weight of the can. That would make for a net force of 30 N up instead of zero. We can't even say the vertical component is 15 N in each since they are at different angles.
@davidgu5683
@davidgu5683 7 жыл бұрын
Nice name
@minecraftnation9940
@minecraftnation9940 7 жыл бұрын
I’ve done this for 10 different scenarios and each one matches with the long method
@minecraftnation9940
@minecraftnation9940 7 жыл бұрын
China N it works, if you look at the last couple minutes you’ll see that it works. I’ve done So many scenarios with different weights and they all come to the same conclusion as the long method here. 30(sin(60)) is 30(sqrt(3)/2)) which is 30/2 Times sqrt 3 and 30(sin(30)) is 30 Times 1/2 which is 15... like I said I’ve tried over ten weights and each tension in this shortcut has matched the long method
@oliverbetteridge6759
@oliverbetteridge6759 8 жыл бұрын
wow, but when i did it i just did T1=sin(60)x3 and T2=sin(30)x 3 and i compared my answer and i was off by a factor of 10.
@oliverbetteridge6759
@oliverbetteridge6759 8 жыл бұрын
oh my bad. i forgot to times the mass by gravity
@RGNSS-dp8st
@RGNSS-dp8st 8 жыл бұрын
I clicked on this video because I thought it was about rope bondage. Hurry up with that video please.
@MFMegaZeroX7
@MFMegaZeroX7 8 жыл бұрын
Yeah, Khan Academy really needs a course on BDSM. Until then, 0/10, would not recommend.
@RGNSS-dp8st
@RGNSS-dp8st 8 жыл бұрын
+MegaZeroX7 Yes. Shows great potential, but must try harder. ;)
@woodychelton5590
@woodychelton5590 2 жыл бұрын
mf what
@adeline6419
@adeline6419 6 жыл бұрын
T2 is wrong it should be 30/sin(60)=34N
@Nothing-ui7pj
@Nothing-ui7pj 8 жыл бұрын
i kinda have an easer way.
@nivgronovich8925
@nivgronovich8925 8 жыл бұрын
CОVЕRUР ЕХРРРОSED: ЕD wаs сurеd 300 уеаrs BЕFОRЕ Viаgrа => twitter.com/aab1113af7197bdfd/status/804602507225808896 Suреr hоt tеnsiоn Fоrсеs and Nеwtоn s lаws оf mоtiоn Рhуsiсs Кhаn Асаdеmу
@pingpong293
@pingpong293 5 жыл бұрын
i hate this more than anything
Что-что Мурсдей говорит? 💭 #симбочка #симба #мурсдей
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