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Center of mass | Impacts and linear momentum | Physics | Khan Academy
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- เผยแพร่เมื่อ 3 มี.ค. 2008
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![หมานแต่ผัวเขา - แสตมป์ โตเกียวมิวสิค [ OFFICIAL MUSIC VIDEO ]](http://i.ytimg.com/vi/m0g1TSBJPgo/mqdefault.jpg)
yo im freaking dying at homie tryna jump over the bar rn. neck broke and hes got 3 feet tho.
Was he about to show an example of throwing a horse around its center of mass?
nope.
22 pound rulers and horses that look like baby elephants. Man physics is confusing
did you figure it out :p
🤣😂🤣🤣😂🤣😂🤣😂😂
It has been 9 years dude... Are you alive?
@Ashton Kylan Nope, no one cares...
I was just saying that diagram isn’t anything close to a horse😹😹😹
Really cool example in the end !!!!! A nice presentation too !!!!
How does he know everything? All I know is the subject of what I'm studying right now
Mythbusters are not the only ones with a team of researchers and script writers.
That sentence taught me two shocking things
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
Yes once you do a pHD in science you will know all this too.
Uhm, Sal doesn’t just extraordinarily teach science guys, check the other playlists haha
I really loved the last example
Thanks
Everyday applications like high jumping! that made my evening
Awesome, funny and logical!
The picture of high jumper is awesome !!!
Thank you so much for doing this. I can actually understand physics now :)
You do a wonderful job!
are you still understanding physics?
awesome video :D last example was great !
That's a lovely horse XD
Perfectly balanced, as all things should be
After even 13 years this is helping!
Sal, you continue to amaze me!! Thank you. That high jump example was really awesome.
What are you doing now for your job? I am seeing comment in 2022
@@AdityaGupta0130probably in the field of engineering aircrafts if he really stood by that name
You saved me!! Thanks for your amazing video
Thanx sal khan........for the awesome explanation ........
hello is there any one alive here ?
I am…..
Yeah😂
🖐️
Don't scare him , he haven't seen zombie, he would be scared to see us
Nah only dead ppl
As a Knife Catcher. I found this video very helpful!
so helpful thank you!
Every day applications like high jumping
thos drawings are hysterical.....understood the concept too
Real life applications for the win! Learn something new everyday :P
4:50 sir discovered a new generation of animal on earth 😂😂
Thanks, I wish you taught me physics and calculus in varsity.
THE HORSE. hahaha
Beautiful horse, thank you Sal.
THOUSANDS OF GREAT VIDEOS!
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...
DAMN AWESOME SQUARE !!!! and of course awesome videos :) thank you very much
Thank you very much! :)
uhhhh, Can someone explain what happened at the last example? why is the center of mass below the bar?
All praise afro horse
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.
How? and could this be made to a new propulsion system?
+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.
Im watching this 13 years later 😂
Sir you are just great
Thanks sir, appreciate it
That's not a horse.
tell em oscar
That's baby elephant 🐘😂😂😂
Tell em Sheathxll
good job your video's are so educational that we have to watch this for homework in physics
12 yrs wow
@@kadakmketema i know right! Which means that’s how long it’s been since I was a senior in high school
I just wonder
excellent as always
6:42 😂😂😂😂 "I don't recommend that you do"
Orange Styrofoam and Green lead. Makes perfect sense! ;-)
Thanks very much !
*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?*
I have the same question.
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
How can the center of mass be distinct from the person...?
Just amplifying your point...
Thanks man my class is building bottle rockets and I had to find out how to keep it moving straight
lol that was a horse?? hhahaha
modern horse LOL
@@sulaimanahsan6651 Chup it is mutated one.
If the force is not at centre of mass than what we can do..can we use parallel axis thrm..?
Amazing!
you drawings are very entertaining thanks for the help :D
Hahahahahahhahahahahahahahahahahhahahaha 😂🤣🤣🤣😂🤣
Great explanation!
Hi bro
Thank you Sal...
I thought Mr. Sal knows everything, now I know maybe he is not so good at drawing horses LOL
5:42. I dont know why i even drew the horse
I have a question how to consider friction in a centre of mass???
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!"
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?
I wish u could have explained a problem or two
I am sure anyone would after creating hundreds of great videos.
lol, 'if youre a knife catcher, which you should consider" haha
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.
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 ..
'thousands' of great videos
Thank you
3:22, Illuminati confirmed.
illumenati confirmed XD but thanks that really helped me
Wow man 15 years at 240p
The most beautiful horse I have ever seen.
great,,,
Jesus Christ the dudes foot split in half
HAHAHAHAHAHAHAHAHAHAHAHAAHAHAH xDDDD I was thinking the same xDD
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.
I didn’t quite understand why having centre of mass below the bar allows for higher jumps with the same effort?
That is a very heavy ruler.
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?
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
@batmanownsyourass The forces of friction interfere with it.
Now I understand how " pen spinning " works !!
Super entertaining, must watch comedy education
nice... ahm,, can you help me in my statics of rigid bodies subject>?
4:10 geographic center again. That's a heavy ruler btw
@cCaglarOne I know! He has come so far!
How does one move their center of mass
That's one heavy ruler
thanx
This video was uploaded when I was 5. Wow
Wow a 10 KG ruler...This is something else
Styrofoam is Lighter than Lead
Orange Styrofoam.. Excellent band-name!
A 10 kilogram ruler?? That's 22 lbs lol!
It's 10 kilograms lets leave it at that
Lol lol mat Kar lol tera jaat.lol se tu paida hua hai lol tera baap.tu indian hai na re halkat.
awome sal! your way way way way way way bettttttterr than our lame teachers!!! i owe you my good result all thanks to you! :)
You made a slight error with the eccentric force on the bar because it causes translation as well as rotation, not just rotation.
That horse😂😂😂😂 damn
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???
I love you man
@BR3AK1NGbenjamin It's not their own English; it's just a variation of British English which means they are not spelling "centre" incorrectly as you originally claimed.
Hmm.... I'd say hippo with a toupee. Still super helpful though. :)
If the ruler is 10kg doesn't that mean it will have a downward force of approximately 100N? If that's the case then shouldn't the net force be 90N downwards with an acceleration of around 9m/s^2? Please explain.
Jayanta Chatterjee in the problem, for simplification porposes, gravity was not considered.
Oh I see, thanks
yup it's mostly the same
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
It is 2017. So, did you get into IIT.
the world wants to know what happened
Are you alive after doing engineering ?
knife catcher? sounds fun
"...the object, that looks like a horse..."
Hahaha, no it doesn't!
Thanks for your great vids!