Position vs. time graphs | One-dimensional motion | Physics | Khan Academy

[@ddang1009]

Best, Fun Explanation for the right audience like me, who was bored to death about physics. I made it through a 15min video!!! Thank You!

[@Carsive]

Haha! The name of the lecturer is also David! ;)

[@ChristinaKilgore]

I like this instructor, he's entertaining

[@neruneru9713]

"Physicists love this, teachers love this--" And as a sophomore in a room of juniors and seniors who knew what they were doing, I am dead.

[@caseykang6570]

im going into ap physics 1 next year in 9th grade lol im studying ahead of time XD

[@neruneru9713]

@@caseykang6570 woah good luck! As much as I whine about the math, I do think it's a pretty fun class. The demos and labs are something to look forward to since you see it all in action!

[@caseykang6570]

@@neruneru9713 ty! I hope I don't fail next year hahah

[@familytingzoyea6940]

'Oooh its a pink helmet... She's pretty'😂😂😂

[@lExN34]

That made me smile😄😂😂

[@Rian-kun_1410]

that made me laugh my butt off XD

[@johngrimsud1549]

that is such a cute turtle (I love turtles) ! tks it is really easy to understand

[@familytingzoyea6940]

Lol

[@ezraglasman8789]

Dear Sal Khan, I hope your year is off to a great start! I am learning Physics now, and my teachers are having me watch this video. I must say, it is very well made! Thank you for all you have done for students around the globe. With gratitude, Ezra P.S. Please consider teaching at our school. We would be happy to have you!

[@sandyhoang8878]

"What a total noob"

[@DendroDragon]

It's actually "What a noob" :D I don't know where you got "total"

[@bannable6650]

@@DendroDragon shut the fuck up

[@shabadoey]

@@bannable6650 chill

[@ayounglad7304]

I love silly examples. They usually stay in head a lot more than regular ones.

[@-wonqs4191]

lol...you just made me think positive about my physics...now ill just remember turtles in my exam

[@xanderia9850]

*There was no distance travelled. That was the awkward part* 'Cause it might hurt feelings' LMAO WHAT

[@rakeshpradeep6575]

THIS WAS SO HELPFUL

[@mcu1085]

Thank you for caring for the turtle's safty! The turtle should have read the intructions on her jet pack before launching into space...

[@leonadawn9998]

I had so many on the list on my pointers to review about this and you just put it in one video, tysm!!

[@aaronivey3133]

HUGE HELP thankyou!! I have online classes so it's nice to see it instead of read it

[@supr_be]

love the turtle

[@iconic410]

Mosty sassy teacher ever 10/10

[@xmlgstudios3467]

Physics is good Science is cool Khans academy ,is the best thing to use

[@sirisaacnewton2302]

When I created calculus, I didn't expect it to be taught using a jetpack turtle with a neon pink helmet.

[@tanishbajaj9517]

can i get a test for this playlist as i want to know if i already know the concepts of 1 d motion

[@dibbyabarua9499]

I had a quick question about what the INSTANTANEOUS VELOCITY of the turtle would be at "t= 4 seconds"? Because there's a corner and according to calculus, when you have a "CORNER" or a "CUSP" in the graph, it has "NO DERIVATIVE", that is you CANNOT DETERMINE the SLOPE of a "CORNER/END POINT/ CUSP". Besides, this graph CHANGES slope SUDDENLY at t=4 seconds. So, can we determine the instantaneous velocity at t= 4 seconds?

[@bhavikdodda]

No, we actually can't determine! It was just represented that way for a simple example, otherwise, that kind of position vs. time graph is not possible at t=4 [or even at t=2]

[@diyarmahmoud]

The slope at x=4 is undefined, so the velocity at x=4 is also undefined.

[@shreyaroy3179]

The best video I have seen in a while!

[@masterhellsing8267]

you just made learning fun. You rock BIG TIME

[@annabethsullivan8388]

This is GOLDEN thank you!

[@GandyDev]

His voice is so good...

[@xdgaming952]

ikr im in love with tht voice, hope he's handsome too xD

[@xdgaming952]

@@josiahkeesling6978 xD

[@pattonbui9994]

This is really helpful, thank you

[@Scorn4Narwhal]

I like David, David's funny

[@xdgaming952]

It's david? :)

[@zyra5832]

had the time of my life watching this

[@KaydinGrace]

Turtle: Did you just assume my gender??

[@rebeccaastill3293]

liking for the pretty turtle lol

[@FireKnight150]

You’ve saved my grades so many times

[@aliborsaru1373]

OKAY THIS VIDEO MADE ME LAUGH TONS also fixed my physics problems BONUS

[@dabidmydarling5398]

i love this guy's voice, he sounds like kermit.

[@midnull6009]

instead of using S as an avg for speed....should have used r for rate, S is indicative of displacement...

[@PenandPaperScience]

For those out there that want some more practice, I uploaded a video where I go through such exercises step-by-step, explaining everything I do along the way. It might help :)

[@Rulitooss]

This is just a beatiful explanation about

[@sismws7041]

bro what

[@annmaryclitson7624]

what if you are asked to find the instantaneous velocity between the two slopes?

[@nacerlifaacademy]

Nice presentation

[@Liz-di9yg]

TURTLE WITH A JET PACK TURTLE POWER

[@familytingzoyea6940]

Kawaii Derp That is A Percy Jackson need😂😂😂

[@heeralchauhan1128]

thank you so much

[@瘋狂是真實的]

Fun experience I subbed

[@Eyuu-iz6ru]

Please position of velocity time graph

[@xdgaming952]

doesn't that confuse u when u have to find instant.velocity like i mean it's a slope but the numbers are changing, i wanted some brief explaination, btw loved the way he was teaching tho, making it funny, i seriously bursted at a part, it's good to teach tht way

[@myagrimm4719]

That Freudian slip in drawing form at 6:01 🤣

[@sussusamogus7831]

Good job man!!!

[@tilakrijal3689]

awesome sir, that was great

[@susannaleddo2304]

I hate doing assignments on this at school

[@salmahrehman6479]

Thank you!

[@tianlam5394]

For the instintaneous velocity is -4 m/s to the left refering to when the turtle is going backwards? If so does that mean when the turtle goes forward the instintaneous velocity is 3/2 m/s to the right?

[@renewd]

This was awesome in every possible way. We need rocket booster turtle merch.

[@tanveerhussain7965]

It’s slope gives velocity or displacement

[@bgbzero]

That turtle's Meg! I knew it!

[@anilkumardixit1283]

Cool

[@maxgoose707]

"she is a 3 meters" Turtle: UHM EXCUSE ME?! ARE YOU ASUMEING MY GENDER?!

[@alberoDiSpazio]

I have an equation x= f(t): t So x=t. Then, 1 unit length is equals 1 unit time. How can length equal time they're two different quanties? x (length) = t (time)?

[@alberoDiSpazio]

never mind. y=mx+b

[@indranishome8220]

Does this also tell about y axis?

[@momoeater479]

can the displacement be negative?

[@junhosung1797]

Yes, absolutely! For example, if you check at t=4, the displacement is -8 from the initial position

[@momoeater479]

Joonho Sung Thanks.

[@annabeladesousa2692]

Yes it is a vector

[@austin16377]

Yes, because displacement is the change of position of an object. If you move back from your starting position, your displacement is negative.

[@alwaysalone6412]

Got exams tomorrow!! Wish me luck!!

[@sismws7041]

Ngl im only invested for that turtle.

[@sirisaacnewton2302]

That being said, it is a very pretty helmet.

[@walkingpineapple4563]

What program did you use for this?

[@johnfei434]

What is the slope is accelerating? Then how would you find the insta. velocity?

[@xdgaming952]

ikr im confused a bit

[@actuallynr]

I have a question regarding how you write on the screen, do you use the mouse or do you have pen/tablet set-up?

[@vedballary2241]

They have a pen/tablet set up

[@lindslu]

why couldn’t you make a velocity v time graph :(

[@aashay8330]

There is one video 4 that

[@lindsey7544]

@@aashay8330 can you send link

[@theenglishlanguage2163]

That is a very pretty helmet. It's pink.

[@merlepatterson]

Doesn't the graph represent the time for the frame of reference of the point of origin? A graph constructed by the traveling turtle might have different contours which graph out the point of origin, not the turtle? Then again, the turtle may have forgotten to bring along some graph paper and a pencil?

[@ceeces5733]

I have exam tomorrow thanks dude I will tell the results later

[@happinessallover]

u didn't tell your results

[@TheSithBlue]

Is the average velocity at 6s 1.33 m/s?

[@NotJustEverybody]

SAVE THE TURTLES SKSKSKSKSKSKSKS LOL IM NOT SAYING THAT ANYMORE

[@themartushow3400]

its not loading and uuuh I'm in schooooool

[@nayireedahjet3320]

so according to this graph what is the ins.v at time t=2???? is it 0???

[@KhaasLog2023]

Nayiree Dahjet yes, u r right.

[@nishihatas]

how to calculate all these if the graph is curved? bc fml my book has curved graphs

[@John-bq1lp]

gotta use calculus and integrals

[@isaacw3212]

1:14 idk why but that made me laugh

[@victor69999]

instantaneous velocity is very difficult cause i am just nine

[@victor69999]

haha good sense of humor

[@shlord]

7:35

[@shadowariel1238]

is it weird that I'm learning this in 7th grade in science class NOT MATH?

[@John-bq1lp]

not really

[@FirebirdGG]

poor turtle

[@Sarah-oq9lk]

I want a rainbow turtle please

[@TheScienceCube]

He' like the Steve Jobs of Physics :)

[@MeaHeaR]

é Power-Phull

[@lotussammme]

set playback speed to *1.25, your welcome.

[@cooperwhittington4853]

Isn't this a tortoise and not a turtle, if the jet pack expels flames then it can't be placed underwater which means that the creature that the jet pack is placed on breathes air and not water which in turn means that this is in fact a tortoise and not a turtle.

[@ckbros2453]

Should've read the instruction. LMAO

[@phoneadda6772]

shi h

[@aliborsaru1373]

wait who is this guy, someone find him

[@RangoV]

I use straw.

[@Nutrision]

hmm, tasty QwQ

[@milotura6828]

Meg is a turtle!

[@justicedodson4896]

Tries to spell "vavg" but his brain immediately makes him spell vag instead 6:00

[@ayaanmajeed]

lol nice way to explain

[@samh8syou193]

anyone take notes on this? lol

[@scis3385]

Am I the only one who thinks that the guy's voice is preetier than the turtle?

[@Handle276]

“What a noob”. 💀

[@belenramirez304]

Very confusing

[@maxgoose707]

nub turtle

[@ShakirKhan-do5bv]

Hindi me bolo na sir

[@stefanozoccarato6559]

puppyy

[@mehrankhanlohani1712]

Ur so funny

[@aplumbertothepast5708]

pog

[@bhaweshchaudhary6393]

how do you know that turtle is he or she, have you checked her ?

[@shahirkazi8766]

Nasty comments

[@shahirkazi8766]

Nasty comments

[@Nutrision]

damn, the only nasty comment in this page

[@Nutrision]

thought u gonna say something about the turtle QwQ