Center of mass | Impacts and linear momentum | Physics

Center of mass | Impacts and linear momentum | Physics | Khan Academy

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16 жыл бұрын

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Пікірлер: 268

@stokes111111 10 жыл бұрын

yo im freaking dying at homie tryna jump over the bar rn. neck broke and hes got 3 feet tho.

@shamimahmed7322 6 жыл бұрын

Was he about to show an example of throwing a horse around its center of mass?

@gpgp 2 жыл бұрын

nope.

@itsMinuteMaid 12 жыл бұрын

22 pound rulers and horses that look like baby elephants. Man physics is confusing

@taanisharora5577 3 жыл бұрын

did you figure it out :p

@musicaldarpan629 3 жыл бұрын

🤣😂🤣🤣😂🤣😂🤣😂😂

@heyijustmetyou9797 3 жыл бұрын

It has been 9 years dude... Are you alive?

@heyijustmetyou9797 3 жыл бұрын

@Ashton Kylan Nope, no one cares...

@taurusking2332 2 жыл бұрын

I was just saying that diagram isn’t anything close to a horse😹😹😹

@AhmedMahmoud-qv4bw Жыл бұрын

hello is there any one alive here ?

@thewould2677 2 ай бұрын

I am…..

@user-ln8cv7vu5r 2 ай бұрын

Yeah😂

@snowman3320 2 ай бұрын

🖐️

@user--2520 2 ай бұрын

Don't scare him , he haven't seen zombie, he would be scared to see us

@nasiiraomar5425 Ай бұрын

Nah only dead ppl

@guitaromania1345 10 жыл бұрын

How does he know everything? All I know is the subject of what I'm studying right now

@KingDeramo 10 жыл бұрын

Mythbusters are not the only ones with a team of researchers and script writers.

@8506goalie 6 жыл бұрын

That sentence taught me two shocking things

@BreakTheBeat852 5 жыл бұрын

I’m guessing you’re studying a lot of subjects, later on you can specialize on one specific subject of your choice, hopefully. That’s what these people do, they specialize on one subject and learn as much as they can about it

@ash.toronto31 4 жыл бұрын

Yes once you do a pHD in science you will know all this too.

@aldreivohnaquino3100 3 жыл бұрын

Uhm, Sal doesn’t just extraordinarily teach science guys, check the other playlists haha

@boeing747200lr 13 жыл бұрын

Sal, you continue to amaze me!! Thank you. That high jump example was really awesome.

@AdityaGupta0130 Жыл бұрын

What are you doing now for your job? I am seeing comment in 2022

@opiumCARTI00 8 ай бұрын

@@AdityaGupta0130probably in the field of engineering aircrafts if he really stood by that name

@shinobix4925 5 жыл бұрын

Every day applications like high jumping

@netadosalazar 11 жыл бұрын

Thank you so much for doing this. I can actually understand physics now :) You do a wonderful job!

@raghidhammoud 6 ай бұрын

are you still understanding physics?

@1992Dadi 7 жыл бұрын

Really cool example in the end !!!!! A nice presentation too !!!!

@rushilpatel7418 3 жыл бұрын

Perfectly balanced, as all things should be

@Bringmeoneofthosechickens 12 жыл бұрын

As a Knife Catcher. I found this video very helpful!

@jayaich7315 5 жыл бұрын

That's a lovely horse XD

@kaleab27 4 жыл бұрын

I really loved the last example Thanks

@turcugeorge5874 8 жыл бұрын

Everyday applications like high jumping! that made my evening

@sakerochting 8 жыл бұрын

Awesome, funny and logical!

@SanityFairs 10 жыл бұрын

THE HORSE. hahaha

@musicaldarpan629 3 жыл бұрын

4:50 sir discovered a new generation of animal on earth 😂😂

@shivambansal99 9 жыл бұрын

awesome video :D last example was great !

@shreyasm3140 8 жыл бұрын

You saved me!! Thanks for your amazing video

@jarikexe 8 жыл бұрын

The picture of high jumper is awesome !!!

@michaelthompson7217 7 жыл бұрын

All praise afro horse

@tasneemferdoustahmeed8091 2 жыл бұрын

After even 13 years this is helping!

@yasmeenkhan8803 8 жыл бұрын

Thanx sal khan........for the awesome explanation ........

@MizzRiverP 9 жыл бұрын

so helpful thank you!

@abigailohara4560 Жыл бұрын

Beautiful horse, thank you Sal.

@LilTeresa101 10 жыл бұрын

Real life applications for the win! Learn something new everyday :P

@organicjuice 7 жыл бұрын

That's not a horse.

@sheathxllinsertclan2590 3 жыл бұрын

tell em oscar

@musicaldarpan629 3 жыл бұрын

That's baby elephant 🐘😂😂😂

@bladeray1014 Жыл бұрын

Tell em Sheathxll

@AnimeTeikoku 11 жыл бұрын

three take-aways: 1. center of mass 2. it's illegal for olympic bar jumpers to take drugs, but it's legal for them to have three feet 3. I am 7 and a half rulers heavy...

@dejesuscassandra6386 3 жыл бұрын

uhhhh, Can someone explain what happened at the last example? why is the center of mass below the bar?

@HAWXLEADER 12 жыл бұрын

THOUSANDS OF GREAT VIDEOS!

@moriahhamilton7436 6 жыл бұрын

thos drawings are hysterical.....understood the concept too

@DerMacDuff 12 жыл бұрын

DAMN AWESOME SQUARE !!!! and of course awesome videos :) thank you very much

@hannakozak3384 8 жыл бұрын

Thank you very much! :)

@survs21 10 жыл бұрын

Thanks, I wish you taught me physics and calculus in varsity.

@blackcharizard09 13 жыл бұрын

good job your video's are so educational that we have to watch this for homework in physics

@kadakmketema Жыл бұрын

12 yrs wow

@blackcharizard09 Жыл бұрын

@@kadakmketema i know right! Which means that’s how long it’s been since I was a senior in high school

@kadakmketema Жыл бұрын

I just wonder

@AbdulRahman-pr4vo 3 жыл бұрын

Im watching this 13 years later 😂

@BangMaster96 7 жыл бұрын

Sir you are just great

@emirselman3984 7 жыл бұрын

How can the center of mass be distinct from the person...?

@user-rs5et1gs2r Жыл бұрын

Thanks sir, appreciate it

@eXtremeDR 10 жыл бұрын

Awesome illustrations ^^ Ever heard about mass transfer with the gyroscopic effect? The center of mass can be transferred to any point - even to a point outside of the mass itself.

@Xzxzkanal 10 жыл бұрын

How? and could this be made to a new propulsion system?

@L9X 8 жыл бұрын

+Quantum no, sadly not, this is a common suggestion upon people who are introduced to this phenomenon, but to create propulsion from altering the centre of mass requires you continuously move the centre of mass further and further away, so if you consider a rocket in a closed system, the fumes expelled from the rocket will push the systems centre of mass away from the rocket's body. So, in a way, it already is a propulsion system utilised by rockets and aeroplanes.

@stokes111111 11 жыл бұрын

excellent as always

@serene9532 6 жыл бұрын

6:42 😂😂😂😂 "I don't recommend that you do"

@mahrezaitm.5162 Жыл бұрын

Thanks very much !

@shirleyfan5232 6 жыл бұрын

I thought Mr. Sal knows everything, now I know maybe he is not so good at drawing horses LOL

@abhijeetas7886 4 жыл бұрын

5:42. I dont know why i even drew the horse

@HAWXLEADER 12 жыл бұрын

Just amplifying your point...

@seemapandey9227 Жыл бұрын

Amazing!

@DeathByLight 16 жыл бұрын

Great explanation!

@jassubehara1924 Жыл бұрын

Hi bro

@johnkim96 11 жыл бұрын

Orange Styrofoam and Green lead. Makes perfect sense! ;-)

@wildbanana5628 7 жыл бұрын

3:22, Illuminati confirmed.

@awesomemantroll1088 2 жыл бұрын

This video is so old he said "I will now do a presentation on the center of mass," and he stuttered so much! Who knew some dude drawing on a digital blackboard would get so big?

@jnp4825 15 жыл бұрын

you drawings are very entertaining thanks for the help :D

@musicaldarpan629 3 жыл бұрын

Hahahahahahhahahahahahahahahahahhahahaha 😂🤣🤣🤣😂🤣

@bluepanda2808 4 жыл бұрын

Thank you Sal...

@Wrobelkrzysztof1 11 жыл бұрын

Thank you

@killmaster398 12 жыл бұрын

Thanks man my class is building bottle rockets and I had to find out how to keep it moving straight

@vanskis7618 7 жыл бұрын

Styrofoam is Lighter than Lead

@aka3673 Жыл бұрын

Wow man 15 years at 240p

@iamnormalandcanbetrusted 6 жыл бұрын

Jesus Christ the dudes foot split in half

@cheesywiz9443 6 жыл бұрын

HAHAHAHAHAHAHAHAHAHAHAHAAHAHAH xDDDD I was thinking the same xDD

@debopriyapalit-me2516 5 жыл бұрын

I have a question how to consider friction in a centre of mass???

@sidgtagamer 12 жыл бұрын

'thousands' of great videos

@pawpawbear1175 7 жыл бұрын

lol that was a horse?? hhahaha

@sulaimanahsan6651 7 жыл бұрын

modern horse LOL

@rockstar-yp3jn 5 жыл бұрын

@@sulaimanahsan6651 Chup it is mutated one.

@luongmaihunggia 6 жыл бұрын

That is a very heavy ruler.

@sulaimanahsan6651 7 жыл бұрын

If the force is not at centre of mass than what we can do..can we use parallel axis thrm..?

@quantumsystems9382 10 жыл бұрын

lol, 'if youre a knife catcher, which you should consider" haha

@marcwittkowski5146 5 жыл бұрын

The most beautiful horse I have ever seen.

@anthonyrajabala 14 жыл бұрын

Hi Sal Your Videos are excellent and amazing . God bless you.I think from F=Ma, 1 Kilogram * 9.8 m/s^2 (gravity) = 9.8 Newtons of force...so 1 kilo exerts 9.8 Newtons of force on earth. 1 Newton is approximately equal to 100 grams on earth.

@glitchy_star_classes6276 2 жыл бұрын

now, heres an amazing fact to continue your reply.. the average weight of  apple is nearly as same as that weight.. so basically 1N is the weight exerted by an average ..

@swarnagirishbennur9159 6 жыл бұрын

I wish u could have explained a problem or two

@jamienewman1488 2 жыл бұрын

I didn’t quite understand why having centre of mass below the bar allows for higher jumps with the same effort?

@megaelliott 15 жыл бұрын

I am sure anyone would after creating hundreds of great videos.

@adwoatumtum 4 жыл бұрын

*can someone please explain further why a center of mass below the bar is beneficial? Because from the drawing, I’m assuming that if the center of mass is below the bar as the athlete is right over the bar, gravity would push the athletes body further into the bar to hit it which defeats the purpose?*

@emilyncolon8815 2 жыл бұрын

I have the same question.

@idrisShiningTimes Жыл бұрын

Doing this involves lesser change in mechanical energy (work done against gravity is less), hence lesser magnitude of force is required to jump over the bar. This saves the athlete's muscular energy and enables them to use the remaining energy for later jumps and not get tired

@adamaqmal 12 жыл бұрын

great,,,

@jeriiahangelo9740 7 жыл бұрын

Wow a 10 KG ruler...This is something else

@ahmedvaskar5270 11 жыл бұрын

thanx

@nrazdan8 11 жыл бұрын

Before he started drawing a bar, did anyone else imagine the other type of bar and think "yessss this is the best life application example ever!"

@gdogvibes1 10 жыл бұрын

A 10 kilogram ruler?? That's 22 lbs lol!

@ThePerfect1077 7 жыл бұрын

It's 10 kilograms lets leave it at that

@rockstar-yp3jn 5 жыл бұрын

Lol lol mat Kar lol tera jaat.lol se tu paida hua hai lol tera baap.tu indian hai na re halkat.

@_xerox_8779 8 жыл бұрын

illumenati confirmed XD but thanks that really helped me

@vovaparkourukraine1 11 жыл бұрын

4:10 geographic center again. That's a heavy ruler btw

@dumbidot7579 4 жыл бұрын

How does one move their center of mass

@DazHuang72 2 жыл бұрын

Super entertaining, must watch comedy education

@megaelliott 15 жыл бұрын

If it was me, measure half way along each side between each corner and mark it. Then link each corner with its opposite facing mark with a pen or pencil and the point where the lines intersect is the center of the triangle.

@megaelliott 13 жыл бұрын

@cCaglarOne I know! He has come so far!

@oneofthem7992 5 жыл бұрын

Now I understand how " pen spinning " works !!

@q_q123 4 жыл бұрын

That's one heavy ruler

@MrJongjongz 13 жыл бұрын

nice... ahm,, can you help me in my statics of rigid bodies subject>?

@Madpolis7 12 жыл бұрын

@batmanownsyourass The forces of friction interfere with it.

@eieilovethis 4 жыл бұрын

This video was uploaded when I was 5. Wow

@unspaghettible 9 жыл бұрын

+1 for horses

@rockstar-yp3jn 5 жыл бұрын

Chup khakti.

@thepurplebooks 11 жыл бұрын

Orange Styrofoam.. Excellent band-name!

@bernardodocruzeiro2496 5 жыл бұрын

what if there is no way a force is applied to an object center of mass because its center of mass is outside the object? does that mean that there is no way for that object to be accelerated in the force's direction, leaving as the only option the rotation of the object anywhere the force is applied?

@arvindcreations2465 7 ай бұрын

i mean this is pretty late, but technically, there is a way, in fact it is must for the centre of mass to be accelerated in the force's difrection even if the COM is outside the body, lets say a ring, COM is in the centre, but still uppon application of force the acceleration is still produced in the same direction

@jackflash8756 8 ай бұрын

You made a slight error with the eccentric force on the bar because it causes translation as well as rotation, not just rotation.

@GG-uj5ru 3 жыл бұрын

The quality here is disturbing. Then I saw it was released on 2008

@RitvikChoudhary 10 жыл бұрын

yup it's mostly the same

@dhirajkhanal5364 10 жыл бұрын

I love you man

@nightmare4eVerr1 14 жыл бұрын

awome sal! your way way way way way way bettttttterr than our lame teachers!!! i owe you my good result all thanks to you! :)

@DazHuang72 2 жыл бұрын

I was 2 when he did this

@barisaxshorty 11 жыл бұрын

so if i was in space and i arched my back and my center of mass was below me, and someone pushed me from the front i would rotate backwards around the center of mass that is below me???

@serene9532 6 жыл бұрын

That horse😂😂😂😂 damn

@luckyvinesh2272 10 жыл бұрын

TO SAL, This is Vinesh Justin.. I am an IIT student aspiring for IIT JEE 2015. I kindly request you to plse cover all the topics of IIT JEE ADVANCE in all the chapters

@gaurav.raj.mishra 6 жыл бұрын

It is 2017. So, did you get into IIT.

@isaacw3212 5 жыл бұрын

the world wants to know what happened

@DigiLiterate 5 жыл бұрын

Are you alive after doing engineering ?