The Two Questions of Calculus

[TheRedAzuki]

Is this like first grade math or something? Because this is what I did in school :o

[TheRedAzuki]

@TheRedAzuki First grade as in when you arelike 8

[xtotal007]

wishing you were my math teacher kind of hard to understant calculus at 15 =/

[fearghalgill]

Wasn't r*t average velocity and not instantaneous velocity?

[lafyguy]

they should put a speed limit on how fast he talks, lol

he make coffee nerves

[Ichiboy900]

"It was so long, by the way, nearly killed me".

heh heh ;)

[pyepyo1]

i don't get the part where you said { D,R,T ; D=R*T ; how do change D=R*T to R=D/T}

and the last question is ,,, where do u get the Rate from..there is only distance and time... so plz help

[ThinkwellVids]

@pyepyo1 This is just a rephrasing of the formula. If D=R*T and you want to solve for rate, you have to isolate R. The way you do that is to divide both sides by T, R*T/T = D/T, the T’s on the side with R divide out to be 1 which leaves you with R=D/T. If you plug in distance and time into this you can easily calculate the rate.

[pyepyo1]

@ThinkwellVids so you mean, you get the rate from the question ? correct?

i'm just a middle school student who want to jump a head a bit.so tyvm.. ur videos are awesome. :D

[ThinkwellVids]

@pyepyo1 Not sure what exactly you are asking here, but as long as you have distance and time, you can calculate rate from the D=R*T formula. Glad you enjoy our videos and hope we are able to help you jump ahead!

[curlyfryist]

@pyepyo1in simple terms if15= 5*3 then 5=15/3

[ThinkwellVids]

@curlyfryist Thanks! That is the perfect explanation!

[pyepyo1]

@curlyfryist awe.sweet. thank for more information.. help a lot XD

[nifrom1]

thats what she said at 20 seconds

[greatveemon]

tbh. this is much really more clearer than me than the ton of pages in a book. plus your energy gave me more excitement.

[autumnreign86]

"Do you actually get enery from these things?.." haha

[BunnyHanyou]

I freakin love you, no seriously I do. I'm taking Calc I next semester and just by watching your videos and looking over my textbook, I'm not so terrified anymore.

[TheDUBMANE]

Thank you guy your the coolest! Anything that can help the poorly educated youth (especially when it comes to math) of America is worthy of recognition.

[Techlur]

Heh, I took the Pre-Calculus course over the summer.

I'm in AP Calculus BC as junior. Looks good on a resume eh?

[cooolmandude]

Thumbs up if you are way to young for calculus.

[Kelly75Lane]

Hi, Mrs. Jones, I'm not sure if this is where we're supposed to comment, but it's all I could find! This video really cleared up one of the main questions I had about calculus, which was actually "What is calculus?" I now feel like I'm much more prepared for this class.

[BrendanMcGo]

Hey mrs. Jones same problem as jeff i found it interesting that two different major calc problems could be solved with 2 similar equations

[Kelly75Lane]

@BrendanMcGo

Hi Brendan! I agree, this part of the video was very interesting. I'm now curious as to how and why these two problems can be so similiar when they seem so different.

[exploto771]

Mrs. Jones I dont know where to write my post!

So I'm going to write it here.

Hi Mrs. Jones!

[airfeek00]

does anyone know if its possible to take linear algebra and calculus 1 at the same time?

[homeworksuks]

trying to get in shape with a 30 mile bike ride

[MasterJake777]

I wish all of his videos were free :(

[ThinkwellVids]

@MasterJake777 We've got a ton of them for free on our channel right now. You can also take a look at our blog and there are even more there!

[hussanali]

@MasterJake777 Its worth paying. Awesome course.

[gort3200]

Look Around You: The Lost Episodes.

[AHSmgaAHS]

i want some of those cd earings!

[jkid1134]

This seems slow now that I watched that other one.

[ThinkwellVids]

@jkid1134 The Calculus in 20 minutes had to be fast since he was teaching so much in so little time.

[blithium]

Arithmetic: Everything practical.

Algebra: How to graph it.

Geometry: Shapes.

Calculus: What he said.

[GuyMcpersonLol]

@blithium artithmetic: numbers

algebra: variables and graphs

geometry: shapes and graphs

calculus: change and variance

[tynitty516]

@GuyMcpersonLol Calculus is the most Graph heavy math ..........

[GuyMcpersonLol]

@tynitty516 i know

i'm talking about the stuff you learn, not use

you already know graphs pretty well by the time you take calc

[ShadowAssassin887]

u have a purple bike?....

[pari6661]

Now I'm scared to take calculus next year!!!!!

[doneintheD16]

he can really explain it, so its ok if he goes off topic. This donut is a lot better than the energy bar haha

[zsozsokel]

love his enthusiasm :D

[darkkonstech]

the answer to the first question is simple algebra. so, it took him 1.5 hours/30 miles, which is 90 min/30 miles. he wants to see if he was breaking the law, going over 20 mph. set up 2 fractions next to each other x/60 = 30/90. (the 60 is their b/c u want 2 find miles per hour & 1 hour is 60 min now u just have to find the miles) so cross multiply (1800=90x) divide both sides by 90, u get x=20. so, he was not breaking the law.

[elfmotat]

That was his average velocity. We're talking about instantaneous velocity. He could have been speeding up or slowing down during the bike ride, so the average velocity is not necessarily his instantaneous velocity at the 20 mile point.

[mjv1992]

Yes, in this case the answer can be found with simple algebra. He used a very simple example. Calculus comes into play when you have a position function (for example I will use y=t^2. y being position and t being time.) Obviously, this has you changing speeds so it would be considerably harder to figure out some algebra to find his speed at say t=20 (if it is even possible at all). Calculus tells us he is going 40 miles / hour at t=20 if position is in miles. I hope you enjoy Calc it is

[mjv1992]

the most interesting math class I've taken thus far. :)

[taijutsu36]

way to eat the example

[fuzzyballs8726]

i like this guy =D

[death68114]

=O

can i borrow your brain lmfao insane nice

[RebornLegacy]

REALLLLY big tires, you can go any where on them actually

love the details that are irrelevant to calculus

[samrah16]

aww he's so cute, and smart.... thanks alot!

[abdullahi22]

This guy is the best. I just wish he could be our professor. my professors. gee thanks man.

[entrailsgalore]

These videos actually did help!

[MasterThief1324]

Now when a Jr. high student understand the basics of calculus, you know this guy is a great teacher!

[TheGrayButton]

I've officially watched all of your calculus videos. I had a C in AP Calculus, and now, I have an A-!!!!!!!!!!!!!!!!!!! It's barely an A, but your videos helped me a lot.

[vnspn]

I love this guy's spirit :)

[tampaytu]

I have a C+ in AP Calculus

[magnetstoo]

He rode at 20 mph.---5 miles in 15 minutes or 20 miles in 60 minutes.,or 90 minutes = 30 miles,9 minutes = 3 miles, 90x=30,9x=3,x=1/3, x*60=20

[Realmasterorder]

The guy is a natural :)

[plumflowerblossom]

that toy demonstration just rules

[RSGTimmeh]

Shut down all the garbage compactors on the detention level!

[JasonRedfield]

CLOSE THE BLAST DOORS!

[ukidding]

a bike rider's speed and size are unrelated

[smzig]

Take an actual calculus class and then come back to this.

[LuckOrLoss]

Once you can find the area of a torus with algebra message me.

[Kaylalewiskayla]

I wish he would just come on he keep eatin

[internetdude01]

this comment makes my brain want to melt.

[baldsquirrel]

He's sooo funny!

[GR1o6180339887498948]

Yep, you basically use limits and derivatives to find both answers :)

[smzig]

And Integrals

[GR1o6180339887498948]

Actually I should have said just limits because both derivatives and integrals are limits.

[kopli222]

donut is better than energy bar... thats part of calculus? wow

[sherilyn222]

Go for the donut! xD

[iansdodge]

awesome!

[Ren520]

LMAO INSTRUCTING AND FUNNY =D

[salvadorianroberto]

wow lol

[google141414]

thanks for your help

[Bmo8b]

thank you for posting this; hopefully my hs calc will seem this fun

[jirafee]

you are my idol,,keep it up idol!!!you really connect!!keep it up!!your really funny and informative!!

[adeadlysniper]

Lol, this guy is awesome!

[jaeshim1]

you are very fun to learn from

[azuran133]

Long live professor!!!

[pwj316]

ur videos help so much! thanks

[Wagcampbell2009]

Its a couple weeks from the AP exam and I'm glad I came across your videos. They helped me remember everything I forgot over the year.

Great for visual learning *****

[harakyryx]

i love this guy...he's...metal \m/

[warlock1276]

you rock i learned alot

[estringfellow]

interesting

[MBacon101]

an ameoba..lol

[konitsas]

I've just really understood what calculus is about, thank you man!!!

[thisaintminhma]

wow what a great professor

[celisto001]

he kept me interested the donut get teh donut!!

[alostwolf]

wow he's a good artist too

[bobmarleykagan]

you are really really fantastic man. i wish all the teachers are like you so maybe everyone will love maths in one day and understand the meaning of maths in the life. u should write a book with the examples of the life and teach it to everybody

[triniidaddy]

mmmm donut

[coolqueenvic199]

Where is the next part that answers the two questions????????

[coolqueenvic199]

Where is the next part where he actually answers the question.

[kaironchi]

wow, this really helps, pretty much genious...i could freakin study calculus myself home...just for fun...thnx

[hman9981]

Where are the answers to the two questions???

[iPWNu08]

this guys freakin awesome

[moali505]

man i wish education was free

[zooropa1844]

nice job!

[carlitos181818]

awesome !

[yondaime5685]

Very modern and fun... Keep up the good work.

I'm going to ask my Calculus teacher to show your videos in class.

[ncbookz]

they will not do this because it will boot them out of a job

[Jolamarajami]

I am in grade 6 and i'm looking at it. In class. Everyone laughes at him b/c he said SNIIP SNIIP while he was cutting

[ThinkwellVids]

@yondaime5685 Thank you! We love when people recommend our videos!!

[yondaime5685]

@ThinkwellVids It is funny because this comment was two years ago when I was a senior in HS. But thanks, it did give me a good "overall picture" that helped with the foundations.

I would also recommend the TTC series - "Zero to Infinity -- A History of Numbers" to others. It is lectured by the same guy in this video. (Edward B. Burger, Ph.D.)

[johntkucz]

this guys so awesome and hysterical and inteligent. He eats the bloody food in the demo!

[ncbookz]

per einstein time is not linear so.... this proves calculus has error yes?

[bradkey98765]

you are hyper 8O

[PeRcpiskot]

Keep it up...GJ!