Inclined plane force components | Forces and Newton's laws of motion | Physics | Khan Academy
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- Опубликовано: 14 окт 2024
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Figuring out the components of the force due to gravity that are parallel and perpendicular to the surface of an inclined plane. Created by Sal Khan.
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Easy trick I learned from my physics teacher on when to use sine or cosine. It works every single time and you don't have to remember sohcahtoa or which side is the "x" or "y" values:
Is the line that you want to find the value of touching the angle theta? Use cosine.
Is the line that you want to find the value of NOT touching the angle theta? Use sine.
Touching angle = cosine
Not touching angle = sine
I've known that trick too, but I found it helpful to go through the cos, sin and tan rules anyways
thats so confusing
Thanks a lot
What do you mean by touching
Can you prove it
I just wish my physics teacher would teach us the intuition behind the mechanics we learn rather than just memorizing formulas ! Thanks Sal :)
A lifesaver when you teacher just doesn't explain it thoroughly enough for you to completely understand.
Ugh I feel you. Some teachers just dont give all the information in order for me to understand. They just "simplify" it.
I feel you
Ya
Me to.I don’t get it,Right?
Tony Stark doo
physics used to be my biggest enemy in high school. and now i'm about to study engineering in university. wish me luck😂😂😂😂
Update : i changed my major in 2018😂😂😂😂😂😂
Come to hell
Gudluck
Lol I’m gonna study astrophysics
@Farah KSP hunn araam ee...???
Nice!
even after all this, this is way over my fucking head
this whole force competent is way too confusing... and I have an exam tomorrow
fuck my life
fml too.
Sturmovik how was it?
Dude same. Test tomorrow and I am clueless as hell
+Talha Bedir
Obviously did not make it. R.I.P. Sturmovik 2015-2015.
RudeGuyGames :D
It's funny cause I'm watching this for the second time. Last year I watched this for Physics, now I'm watching this for vectors. It's interesting how two different subjects can overlap each other.
DOGE™ Vectors never go away. They are integral to Calculus 3 as well as Physics. Its all related.
What do you think vectors are ?
They are a part of physics, physics can't work without vectors I mean what are you gonna do if you don't have vectors in physics. Vectors are the back bind of physics .
seems so easy when he does it...however, when my teacher explains it seems like Chinese alphabet.
We as Online Educators can explain things patiently because we choose to do this in our free time and are passionate about education
@@PenandPaperScience teacher only passionate about their salary and give no fxxck about students development
wooow. I was lost about this subject. I mean, I know that the angle of the inclination is going to be equal to that in the center but I don't know why.. ive been seeing it in other videos but they just skip it and wont explain how they were able to conclude that. And, you did! thank you so much! its so much clearer now!
"Physics" fucks up my grade for junior year in HS
+Sean Mcgrew do you have regular, pre-ap, or ap
Same here, test tomorrow and I'm lost
***** I'm taking ap physics 1
When you get to Calculus and vectors you'll finally think to yourself how easy this was.
this is some middle school lesson
8:30-8:34 _"Of the total,the total,the total,the total....."_
This guy rocksss
Best teachers start from the basics and explain it all. It helps out those who don't immediately get everything or who don't have as great a base as you do.
Its amazing that they make learning process such a fun and adventure in US.
Exactly what I was looking for. :)
Thanks a lot !!
#LovefromIndia
you didn't invent anything...
you live on your own world don't you!! :EnderDexter
Nandha Kumar lol..... Bro... U just happen to be in company of bad teachers
It's just that classroom learning is boring
Those last 40 seconds or so were just the best
Thanks! Even after completing whole two chapters based on this concept, I was wondering where the theta b/w resultant came from. Finally, I understand it now.
of the total ... of the total ... of the total ... of the total
Such an excellent instructor.
Inclined plane problems absolutely ruined me in college. Even the TA's couldn't help me make sense of it (they tried!). But now the fog is beginning to clear!
Sal, thanks for the refresh on this! I love studying this kind of stuff, and your videos help me memorize all the crazy math involved.
You make things make sense in such a wonderful way! Thank you
Thanks for this, I've watched these videos for stats, probability, vectors, some chem, and now this. It's a lifesaver in school.
It'd be much simpler if he used numbers and actually did the problem rather than leaving us hanging dry.
ikr
This is how it's done in lectures. It's a proof of how this method essentially works for all simple inclined planes. They use the symbols rather than actual numbers because theoretically/mathematically, the values and numbers are going to cancel/ combine very nicely. And also not every problem is the same with an inclined plane, so this also shows how you go about to set up your knowns and unknowns
While I agree that it would be a little easier, you could always just do what I did and think up of a random mass and value of theta and just follow along with the steps shown in the video.
That is quite low understanding of variables. Hope you know know why that is how it is.
I love the way the video goes into all the details. That way all people can understand it! Thanks a lot Sal!!
THANK YOU SO MUCH, THIS WAS A BIG HELP. I WAS STUCK ON THIS QUESTION FOR 2 DAYS!
Wish I had come across this a week ago. Excellent explanation!
awesome explanation
thank you sir
I watched this vid for work , yet I was able to apply it.Amazing teacher
Your explanation is perfect. Greetings from a person with perfect expectations! I love this video. No one suggests about the magnitude. To someone who has made physics already, it can be obvious. To me, it was an intuitive hint, but not confirmed by other videos! Thanks!
you just changed my life
Thanks for the help!👍🙂 Just started my first year of college. Majoring in physics but this is one of the things in classical mechanics that I have trouble with. Don't know why, it's just trig and the only formula needed is Newton's second law: F=MA.
XD. I was completely over thinking it. But great video, it was very informative and easy to comprehend🙂.
My Physics AS exam is next week and I FINALLY understand this!!!! My (awful) teacher has never taught us this and my textbook is unclear, so I was stressing out but I get it now omg, thank you!
You are without a doubt the best teacher. Thank you!!! I finally understand
as difficult as this is to make PERFECT sense of mathematically, for me at least, it is a beautiful example of why it makes sense, thank you so much!
Thanks of the explanation, completely cleared all my doubts
I like how your writing is improving as videos get more recent xD
I was only stuck with the how we knew the two theta angles where equal and you explained it amazingly. Thanks :)
Thankyou so much. I was longing for such explanation on resolution of components of mg...
The intuitive part really helped.
Thanks.
Super explanation ,Thank you so much!
Thank you so much!!! You are helping me get through my physics class and it means the world to me!!
He made this so easy. Much appreciations!
Thanks for clearing the air, sir. God bless 🙏
I love physics and now I love your teaching
though im watching it soo late
this video cleared all my doubt on this topic
THANKS A LOT MATE !!!!
Knowledgeable video sir.explanation is excellent
I finally understood it thanks to you.
Thanks for explaining how theta comes between two components of weight
Thank you sooooooooooo much. The colours helped like you wouldn't believe
Excellent video. I was unsure as to why I couldn't do sin(theta)=gravity/hyp was not correct in finding acceleration about the hypotenuse but now I understand. Thank you Salazar
Sal, you are a life saver ☺️☺️
Finally understood 💗💗💗.thanks khan Academy.
I just loved this video.....i thought that i will never be able to understand how we break the force into components bt just becoz of this video i m now able to ............Thank u so much
Great!!
Thank you
Everyone says that. But with a teacher, it's not one-on-one, so it's easy to fade out, and not absorb the information. With a video, it can be repeated, and it has your unconditional undivided attention, so your physics teacher is probably a good teacher, it's just easier to learn via the internet...
Literally the exact thing I was looking for
A Quick question.
What would be the resultant force?
The sum Horizontal and vertical components??
- via YTPak(.com)
you are now my free personal tutor...thank you!!!
Very nice and good explanation... Thanks a lot
Khans the sort of name that a person I wouldn’t like would have
This class is awesome, your explanation about the reason why you have that second "teta" angle is very original and it got better my understanding! Greetings from Brazil!
Thanks sir. I was taking lesson from my teacher and still can't understand. It's now fully clear to me. May Allah give you success and more success in near future.
Man, you are a life saver for a poor student who will have his physics exam soon :) Thanks!
LifeWithGod99 did you pass
Teachers just do a kind of formality ,They never taught so deeply like this in in lectures. Thanks for the video lesson it really helped me a lot visualising the concept
best tutorial i have ever seen in tube 😊Thanks a million
Your literally an angel
Awesome I loved this video this is mind blowing
yes, 08drumerman, you are correct. my reference was to what initially occurred: "He was forced to take back whatever he had said but he wrote a book indirectly supporting the theory of heliocetered universe, this time the church took strict action against him and he was put on house arrest due to his age.But for your Information he proved the theory in the year 1616." so lots of people were msilead cuz he didn't develop balls til later. at first, he did "take it back"
This guy is a saint
and to think that this 12:42 video explains in better detail and is easier to understand then a 1.5 hour long lecture , why do i even go to class anymore lol
You are the best teacher i will ever have!
Thank you so much for explaining this in such a simple way.it took me a lot of effort but i wasn't able to understand it but u explained it so easily.thank you
Thank you sir.... Upload about pulley problems.
amazing videos for full explanations and review before test
I see your point, but it's up to the student to take the initiative and get help when he/she is struggling. But when the teacher is indifferent to begin with, then that's an entirely different matter.
The problem with school lessons is that teachers tend to not realize when someone is having a hard time with something.
The educational system works in a way that you must quickly learn a lot of stuff, pass a test on that, then right after that learn a lot of new stuff and pass a test on THAT.
And so on.
And if you are even slightly insecure of one specific part you can bet your life that you need to be an expert on just exactly that thing in order to have a chance to understand anything else.
❤️ clear sir ❤️
Every thing's fine but we'd appreciate if you had explained it with an example about finding friction etc.. Bcoz it's way too helpful
Question: When we consider an object sliding down a slope we say that the reaction is counteracting gravity, there is a component of the objects weight acting down the slope and resistance due to friction has no vertical component that interacts with the reaction force.
When we consider circular motion on an inclined plain, we say that the reaction is due to both resisting gravity and also takes into account the vertical component of friction, and that the objects weight does not have a component acting down the slope.
Why do the laws of physics seem to 'change' so much between these examples? Why do we consider some things in one and not the other? This has been bugging me ENDLESSLY, any help?
I also have the same question , but what’s the answer ?😭
he make evrything seem so easy woww.thanks sir!
thanks if i ever crack iit , i am going to promote u guys like crazy
Mind blowing
thanx a lot...since u explain from the core...
Thanks........so much....earned a new subscriber
Great explanation! thanks.
THANK YOU! GOOD REVIEW FOR MY AP PHYSICS TEST TOMORROW :)
very helpful, thanks.
Very good explanation!!
Thank you so much! this really helped! i have an exam in 2 weeks time and now i finally understand the inclined slope concept! thanks alot! :D
In your example What will be the net force on the ramp if the bottom of ramp is free to move on a frictionless horizontal surface
Never knew physics had this much math
physics is basically applied mathematics
Umm ya physics is math. This is nothing.
Thanks Khan you helped me a lot!
Thank u for the explanation
I wish I could give two thumbs up to this video. Ty
really right from the base i liked it veeeeeeeeeeeeeery much thanks
The notation made it a little confusing tbh, but pretty solid proof
Thanks sir Jiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
Thank you. That was extremely helpful
this thing is great but I hate the notation he used. I wish he would just call it Fgy and Fgx.
The problem with that is that Fgy is only perpendicular to the plane on one degree, while Fgperpendicular states that Fg is perpendicular. Same goes for Fgparallel
Pre-calc test tomorrow, thank god I'm an English major and I will never see this crap in my life again.
Recently this topic got transffered from A-levels to GCSE and my teacher did a very bad job explaining how the weight if split into its components i just emailed this to my teacher to help her learn something!!!