Damnit Shantanu you're driving slower than Ben is running.

Thank you, thank you so much! I'm a college freshman and when I was in high school I never had a physics class! My lecture professor is so hard to understand and his hand writing is awful! I watch your videos and everything starts making sense!

this vid is 10 years old yet i still watch it

"times time" haha, I can see that getting confusing at times :-P Maybe "multiplied by time" is better.

I really thanks alot of Khan Academy for teaching & sloving science problems.

I'm still in middle school and this means a LOT to me. Thank you so much!

very interesting and valuable channel.

Wow I'm not even in middle school (After my summer though yes) and this is a lot easier to understand than what I thought. Thanks for helping me (:

this video is very impressive because you give all the information that i need to know..

I want to say a special thank you for these coherent and fantastic lessons!

I can't thank you enough for these videos.

you now what you are the man of physic I like this so much thank you for this video great job bor

ขอบคุณค่ะ สอนดีแถมมีซับให้ด้วย

So, basically, as a simpler way of viewing it, to find *t* you can just change r= d/t to t=d/r.

i understood it much better and it helps me to get everything into my head

you guys are the best I learn so much from you thanks

@Stin Ray. Let me tell you in how many ways Sal exceeds your "superior" teaching style. Reason number one, his stuff is free, as in COMPLETELY UNCONDITIONALLY free. How much does it cost to attend your lessons sir? Right. Secondly, Sal doesn't act like a total douchebag, generalizing other teachers. (Out of jealousy perhaps? I'm not judging though, just speculating). Third, he has undoubtably a vastly larger knowledgebase than you. Because if you were truly that magnificent as you let us think you are, then how come we have never heard of you? Let me guess, you're a brilliant mind seeking to live a life in solitude? I'm sure that's it. And lastly, who are you to decide which style of teaching fits everyone's needs and should be aknowledged as a universal standard. There is no such thing my friend. Teaching is about passing on knowledge. The way one achievs this is by commitment and effort. What Sal is doing with his website is extraordinary, the amount of effort he has invested in terms of hours, available for free, for everyone out there results in a massive amount of knowledge, his knowledge, being available for millions of people around the world. That is teaching in it's purest form. Not in your entire life will you achieve this. So don't you come in here and disrespect this magnificent man, nor try to make us believe you are better than him. Because, sorry to say, but even though i don't know you, you are simply not. Btw, fyi, i'm a high school student. I have a math teacher, a brilliant man without a doubt, but he utilizes a style of teaching that just doesn't fit my needs. I hardly pick up anything from his lessons. When i come home, i look up the subjects we had seen that day on Khan Academy, and each week after when we have our lab exercises i rarely have trouble completing them. All thanks to Sal. He has taught me more in hours than i have learned from any school i've been in for years. That being said, some student actually prefere our math teacher's lessons above anything. But that's the point, everyone is different. Not everyone is equally intelligent. But i believe that with effort and time everyone can achieve great knowledge. Saying that, if you can't keep up with "college" teaching, you are dumb is simply rediculous and just proves you are obviously not very intelligent.

Sometimes sal teaches awesomely, other tomes he makes it overly complicated

I did this back in 9th grade (INDIAN)🇳🇪🇳🇪🇳🇪🇳🇪

I actually found the video useful because I know the harder problems build on the easier ones. Some people are stronger in certain fields than others. I obviously speak and write English better than you based on your comment and videos. THANKS FOR THE VIDEO SAL!

This was a life saver!!!!!!!!!!!!

Can you please do one that will involve converting?

I think that 'S' could stand for 'Shift' which is somewhat synonymous with direction.

looks like i'm going to have two math classes :D

thank you a lot :)

7:29 was that a fart? "the 60m/s velocity fart" xD

you are my hero

Is there a name for the solving method used, when the host crosses two or more similar figures? TY

I agree, and it certainly makes sense when you already understand it, but if you're learning it for the first time and following his directions, you would get the incorrect direction.

So I've a question! So basically we can use BOTH formulas for one problem by using vectors formula and scalars formula?Or you've to use one formula for each problem thats asking us to use vectors or scalars? Thank You

Thanks sir

Thank You

How do I find time with distance, acceleration, and final velocity?

You can divide vector quantities?

he just spent almost 10 minutes explaining 720/3. that's a great teacher

god bless you

What's name of this application where this guy works? I mean on this simulation of school table.

We KNOW you wanted to say OneDirection at the end ;)

Much more directly, but less poetically, the Latin word for distance is spatium. For this simple reason, we will use s0 (s nought) for the initial location on a path, s for the location on the path any time after that, and Δs (delta s) for the space traversed going from one location to the other -- the distance

😍😍😍Thanks

Can i use the same thing to calculate for a free falling box?

Which application was used for the video?

ratio and proportion

i learned this on sixth grade, and you should've change rate into speed and you could explain easierin this way: if the question is about to find the time, you could just divide the distance by the speed stated in the question it is the same working if u want to find the distance and the speed. just divide the other stated units. ex: the distance between town a and town b is 147km. a van takes 3 hours to travel fro town a to town b. what is the speed of the van? we know that the distance is 147 km, and the time is 3h. so we just divide the distance by the time so it would be 147:3 which equals to 49. so the answer will be 49km/hour

0:12 3 Minutes per second LOL. Incidentally, this is one of the core problems with a tensed theory of time. Simply put, how "quickly" does the present become the past, or the future become the present? This seems like a nonsensical question, and might explain why "the flow of time" is (possibly) an incoherent notion.

I like what your doing

Will it help me clear SAT ?

@MyYummycookie Haha I guess. But the physics is sort of basic, nothing super tough or anything! It's just hard for me to grasp the topic right now. Haha

Actually he spent a little less than five minutes explaining a formula that involved the numbers 720 and 3. =D

Is there a video for the 'A train leaves city 'a' going 88 miles per hour while another train leaves city 'b' going 44 miles an hour'-esque questions?

This video was 9 minutes longer than it should have been.

Excellent! 😂❤

i thought initial location was si (i for initial)

Can someone please explain what he did? I didn't understand a thing since there was algebraic manipulation involved and I'm not good at it. If anyone understands the solution Sal proposed and demonstrated it would be of great help to me.

however, he is explaining it to thousands of people he does not know, therefore he has no idea on what level they stand so he tries to make it simple and goes through lots of the little things as well.

I don’t understand how he writes with a mouse on a computer without taking his time

This video could have been easily explained via dimensional analysis in under 2 minutes.

is this really a 10 minute video on speed = distance/time?

if i ever meet you i will buy you a beer, or whatever beverage you prefer :DD

What if the unit of r is m/s and the d is kl. What is the result of time? Still second?

It's the same with me.. except I think I'm not the only one who does average.. :P Pushing through though.. (I'm in 8th grade and I'm taking physics)

Take it one step at a time, no pun intended

@Sting Ray, Has probational faculty member fired for making the star quarterback put his phone away.

but what if you have km and m/s what should I do?

Sir what is time

Bro I could do that question in 30 seconds I was just trying to make sure I’m doing it right but I ain’t watching 10min vid on 1 questions 😂😂😂

we can not divide two vector quantities......so please take care of that.

What is the notepad he is using

Video was very good, but I still don’t understand because I’m a mathtard. Any advice?

solve pls no calculator

Cant see what you wrote

Is rate the same thing as velocity

that is the complicated way and showing the formulae but there is a simple way 720m÷3s

excuse me sir how can find the time of travelling of m/s n decelerates of m/s

How does this support the idea of a vector being tangible if we know there is always an outside reference from to which the ever changing current spacial awareness is formless, any direction or dimension we observe or label is nothing but imagination filling a hole of ignorance. How can there be any direction if there is no known solid reality to anchor a reference frame. Would it be fare to purpose we create logic that works if others are fooled by it and believe it to be truth?

i want to know the name of program that you used please

8th grade. Is that possible? I thought it was only for 11th and 12th graders.

My mom makes me do everything on khan academy:( :)!!!

You can do it simpler

I think he made all those formulas because he wants a long video

Help me solve this one: If X person is going in their car at a constant velocity of 12m/s how long will it take X person to travel 1520meters? Is it just 1520/12 ? Because what I get from that is 126.6. It makes no sense, I don't get it. I feel so overwhelmed right now not to be able to solve this simple thing.... If someone could show me ways on how to do this and what I did wrong : (

I didn't have to do all this equations i just divided 720 by 3 and that's it

what deferences velocity and speed??????

i did not understand why you multiplex both sides with time

@Sting Ray, Let's assign a project that requires tons of parental support and parental participation because, well, it's fun to humiliate and degrade the students who don't have access to that.

one direction :)

Faster than Shantanu.

Can you divide a vector by another vector?

it took 4 minutes

@127miles "-.-"

@Sting Ray, Observes probational faculty member teaching critical thinking during evaluation. Accuses him/her of doing the opposite.

@127miles -.-

This is soo confusing at the beginning

@soleloneguy I know! I really dislike my Physics teacher the problems on the exam are nothing like the practice problems she gave us. All of my classmate do really good on her test except me. I don't understand why... Are you struggling in Physics class ?

Paint?

Couldn't we just cancel out the meters divided by the meters at 4:02 instead of multiplying by the inverse since anything divided by itself is just 1?

@belmont2035 lol I guessed the answer in 3 seconds... problem?

some????????!

The last few seconds of the video doesn't make sense the way he explained it. If we assume + is east and - is west, then if the problem were west, we'd have a negative in the numerator and a negative in the denominator, so it would produce a positive answer (east), when it should still be west.

you get same answer from writing out "t" as seconds "s" 3m/s=720m/s 3m=720m 1m=240m but somehow that can't be right? or is it? time can be seconds right? but then it says 1m is 240 meters what kind of answer is that? *confused*