Center of mass | Impacts and linear momentum | Physics | Khan Academy
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- Опубликовано: 3 мар 2008
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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😹😹😹
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
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!
Really cool example in the end !!!!! A nice presentation too !!!!
Every day applications like high jumping
After even 13 years this is helping!
That's a lovely horse XD
Everyday applications like high jumping! that made my evening
I really loved the last example
Thanks
4:50 sir discovered a new generation of animal on earth 😂😂
Awesome, funny and logical!
uhhhh, Can someone explain what happened at the last example? why is the center of mass below the bar?
The picture of high jumper is awesome !!!
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...
Perfectly balanced, as all things should be
THE HORSE. hahaha
You saved me!! Thanks for your amazing video
awesome video :D last example was great !
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
thos drawings are hysterical.....understood the concept too
That's not a horse.
tell em oscar
That's baby elephant 🐘😂😂😂
Tell em Sheathxll
Thank you so much for doing this. I can actually understand physics now :)
You do a wonderful job!
are you still understanding physics?
Thanx sal khan........for the awesome explanation ........
Beautiful horse, thank you Sal.
Thanks, I wish you taught me physics and calculus in varsity.
How can the center of mass be distinct from the person...?
Real life applications for the win! Learn something new everyday :P
so helpful thank you!
All praise afro horse
Im watching this 13 years later 😂
THOUSANDS OF GREAT VIDEOS!
DAMN AWESOME SQUARE !!!! and of course awesome videos :) thank you very much
Thank you very much! :)
6:42 😂😂😂😂 "I don't recommend that you do"
If the force is not at centre of mass than what we can do..can we use parallel axis thrm..?
Thanks sir, appreciate it
Thanks man my class is building bottle rockets and I had to find out how to keep it moving straight
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?
Sir you are just great
Orange Styrofoam and Green lead. Makes perfect sense! ;-)
excellent as always
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
Thanks very much !
lol, 'if youre a knife catcher, which you should consider" haha
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
I wish u could have explained a problem or two
Amazing!
3:22, Illuminati confirmed.
Jesus Christ the dudes foot split in half
HAHAHAHAHAHAHAHAHAHAHAHAAHAHAH xDDDD I was thinking the same xDD
Just amplifying your point...
I have a question how to consider friction in a centre of mass???
I didn’t quite understand why having centre of mass below the bar allows for higher jumps with the same effort?
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!"
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.
Wow man 15 years at 240p
illumenati confirmed XD but thanks that really helped me
nice... ahm,, can you help me in my statics of rigid bodies subject>?
Thank you Sal...
The most beautiful horse I have ever seen.
Now I understand how " pen spinning " works !!
That is a very heavy ruler.
lol that was a horse?? hhahaha
modern horse LOL
@@sulaimanahsan6651 Chup it is mutated one.
you drawings are very entertaining thanks for the help :D
Hahahahahahhahahahahahahahahahahhahahaha 😂🤣🤣🤣😂🤣
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.
How does one move their center of mass
4:10 geographic center again. That's a heavy ruler btw
Styrofoam is Lighter than Lead
'thousands' of great videos
I am sure anyone would after creating hundreds of great videos.
Super entertaining, must watch comedy education
You made a slight error with the eccentric force on the bar because it causes translation as well as rotation, not just rotation.
Thank you
great,,,
*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
Orange Styrofoam.. Excellent band-name!
Wow a 10 KG ruler...This is something else
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 ..
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???
Great explanation!
Hi bro
That horse😂😂😂😂 damn
awome sal! your way way way way way way bettttttterr than our lame teachers!!! i owe you my good result all thanks to you! :)
This video was uploaded when I was 5. Wow
"...the object, that looks like a horse..."
Hahaha, no it doesn't!
Thanks for your great vids!
The quality here is disturbing. Then I saw it was released on 2008
That's one 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.
"When an object is free it rotates around its center of mass" what do you mean when you say "free?" When you put a pencil on the table and flick it it does not rotate about the center of mass unless there is a fixed point at the center of mass.
@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.
thanx
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.
+1 for horses
Chup khakti.
@cCaglarOne I know! He has come so far!
Hmm.... I'd say hippo with a toupee. Still super helpful though. :)
Is center of mass the same as center of gravity?
Spit fact:
The high jump thing is called a fosberry flop