Lec 17 | 8.01 Physics I: Classical Mechanics, Fall 1999

[UnTiedMusicStudio]

Prof Lewin would spend 40-60 hours writing a lecture, and dry run it 4-5 times in an empty classroom before giving it in front of students. Not only is he a genius, but his dedication to his craft is AMAZING.

[rinwhr]

"It's spewing out hot gas"

[AlexandreHefren]

the (delta m) in this case must be negative, so the fuel´s mass is module(delta m)

[abrrrtoooasd]

Walter Lewin is the king!!!!!!

[NicholasJNadon]

What is this professor's name?

[MegaSuperMonkeyMan]

i came up on this while looking to find how to solve 2 column proofs in geometry, im a freshman in highschool, but i find this really interesting. dont know what most of it meens but i will soon

[rkb12222]

@MegaSuperMonkeyMan its pretty basic calculus youll learn it soon it or later

[onix252]

ESTO SE LLAMA AMOR AL ARTE DE ENSEÑANZA ES EXCELENTE ESTE PROFESOR MUY BUEN VIDEO, GRACIAS POR SUBIRLO.

[Gabbiebaby13]

I was bored !

[RUNnGUNify]

what level is this stuff?

[XYZSagitarious]

Sir may Allah bless u..... I have not seen the teacher ever like u..... Your gestures r great.... Sir i have learnt alot from ur whole lectures.... Thank u alot..... May i be the student of ur class but i m unfortunate....

[RazorCallahan2424]

Can someone tell me what 26-100 is?

[quifred]

@RazorCallahan2424 It's the classroom. 26 is the number of the building and 100 is the number of the room.

[chrism216]

i love how he apologizes for not giving the the numbers in mks units.

the students should be thankful he didnt do that ahha

[chocodipper15]

egg.... :)

[astrotrain101]

rockets are cool

[jude1234ify]

Bow down to the DR

[Yami7761]

Who are the 3 people who accidentally hit the dislike button. for such people utube suld hab undislike button.

[takawmiata]

@Yami7761 its called hit the like button...  and you should try using a spell check program. Just a suggestion.

[TmTournament2]

I been laughing for 10 minutes after the video ended

[yourmomlovesmehard]

In Soviet Russia........nah i got nuthin.

[mick23586]

27:45, hahahahahahahaha, "The tomato hits u , thsprssss! "

[SuperSpaceMaster]

I have actually done this to measure the speed of some arrows I was shooting.

[claudp]

wow... I understand this :/

am I normal?

[claudp]

wow... I understand this :/

am I normal?

[airo2142]

@claudp dont worry, me and most of the rest of the people watching this vid are in the same boat as you hahaha

[alkistnieda]

I'm a 17 year old German student and even I understand what he explains. I like his way to demonstraiting physics

[BluCosmos]

He made 2 eggs but only ate 1.

[lonogugeadult]

i saw him on NOVA!!!! he's cool on there too!

[mridularul1]

I love the way he explains physics :)

[Dec986]

This was great reference for animation thanks for sharing MIT

[samuel91222]

the impulse thing makes sense, but i wouldnt know how to do it by myself

[GianfrixMG]

When I watched at 9:18 I wondered what would happen if someone starts making mess during the lesson... xD

[hawk080]

great now i feel dumb

[macro312]

Ahhh i learnt this! its awesome...

[Ajboi89]

Is that an egg pin?

[recyclingismylife]

he lost me at 'bullet'.... the example would be more well served were the example to use a less violent analogy, no?

[aelix56]

@recyclingismylife Gay

[pithikoulis]

I still can't find the use of Impulse :/

[royalsnowman]

What does MKS represents? Anyone knows?

[gruelin1]

coefficient of kinetic friction

[ozqi]

metre-kilogram-seconds units

[royalsnowman]

ok thanks a lot

[matanorland1]

Meters, Kilograms, Seconds.

[strange6]

This is a great lecture if you can do the math

[kel85uk]

Meter, Kilogram, Second...

[Rickao]

Is there a video where he explains Lagrangian Mechanics?

I really need it

[baptistic]

what an outstanding teacher! how dedicated in each of his lectures! long live walter lewin!

[TummywubPLz]

>.> what amazes me is how long you can talk with out taking a break ^^!!!

[TowerCraft]

Bullistic pendulum...

[camlope24]

i wouldnt trust anything from wikipedia use ur text book and learn something

[brilliantdiamonds]

I think that some wikipedia articles are very biased; but i've found a lot of mistakes in textbooks too.

Not saying that i agree with people creating intellectual fiefs out of their favorite articles though.

[jccalmeiro]

wikipedia is a really trustfull source for physics. I am in the second year of Physics Course and I have to say wiki helps a lot when you want to know something superficially and fast!

[flitterific]

totally impressive

excellent

[summerday44]

well well well I see the problem here, my one was in the frame of lab.

[007SeanC]

why are most of your comments removed by the author?

[flitterific]

yeah

cant figure it out

maybe offensive.

[CanisLupus1987]

maybe they were ashamed of some mistakes and took them off

[volintine]

this lecturer is gud but he is weird in electricity and magnetism lecture he hangs a banana in his chest thats crazy

[007SeanC]

these type of people (physicists) are considered to be non-materialistic people, they don' t care too much about money , buying a dream home etc....sunglasses(shades) latest sports coupe, they even buy on sale

[AnonNov]

No, that's awesome.

[88ale]

Thanks to Taylor series we can approximate h = l*(1-cos(theta)) = l*(2 * theta^2 / 4).

We know that:

1) for small angles (when theta --> 0) theta = sin(theta)

2) sin(theta) = x / l

Therefore h = l*((x/l)^2 / 2) = x^2 / (2 * l) is a good approximation when the angle is small.

[yilo8]

absolutely fabulous!

This Professor is ingenious.

[smokey566]

wow, whats wrong with his nipple?

[technogearhead]

It must be so hard for a professor to explain these very simple things for the long duration of the lecture.

[Tyson200422]

I missed something. The weight off the block has to be correct does it not. In other words the block = its weight that is equal to the bullets impact pressure. if you messure the distance the block travels now then you can times that by the block weight and get distance and speed. I'm I right?

[alhenderson]

Nice fried egg.