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Lec 24 | 8.01 Physics I: Classical Mechanics, Fall 1999

Uploaded by: MIT
Video Description:
Rolling Motion - Gyroscopes - VERY NON-INTUITIVE
View the complete course: http://ocw.mit.edu/8-01F99
License: Creative Commons BY-NC-SA
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More courses at http://ocw.mit.edu

Tags for this video: centripetal friction gravity lewin mechanics mit motion opencourseware physics scalar tension trajectory vectors

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Now I understand ... ( 1 month ago by spitgalore)

Now I understand how gyroscopes work. He explained this so well, thanks for sharing.

what? vq != vc (in ... ( 1 month ago by drMerkwuerdigliebe)

what? vq != vc (in global system)
vq = w*R (of course), but vc of a point (lets say P) on the circle (as it is shown on the blackboard) depends on the angle. vc = 0 when the point P has contact with ground then. And 2Rw at the opposite.

...I know what he ... ( 1 month ago by drMerkwuerdigliebe)

...I know what he wants to say. But his draft is at least confusing. He puts two velocities of two different coordinate systems in one draft.

very nice lecture ... ( 1 month ago by drMerkwuerdigliebe)

very nice lecture anyhow. I guess I'm just used to another way of drafting forces, torque, velocity etc.

There's nothing ... ( 1 month ago by cerealkillerds02)

There's nothing wrong with how he wrote it. If you think only about the top of the circle, it only makes sense that it moves with the same speed as the center. All the other points on the circle must move at that same speed, since the circle does not deform.

no - without slip ... ( 1 month ago by drMerkwuerdigliebe)

no - without slip the top is twice as fast as the center.
perhaps you will confirm: the point that has contact with the ground has no velocity at all. vp = 0
Because if it has any horizontal component of velocity it would be "faster" than the ground ->slack.
and this peticular point in contact with the ground at the actual time T: had! vertical velocity downward -deltaT ago and it will have! vert. vel. upwards in +deltaT (for deltaT -> 0 (sec). => vp,vertical(T)=0
Not easy to explain that way.

Haha, this is ... ( 1 month ago by TSPfan)

Haha, this is definetly a dutch teatcher!! They just can't hide it :D. But it's very interesting!

Knowing that ... ( 4 weeks ago by Poofyponcho)

Knowing that doesn't get you paid. LEARN SOMETHING THAT WILL MAKE YOU MONEY!!

why do you watch ... ( 4 weeks ago by drMerkwuerdigliebe)

why do you watch this lecture then? knowing such stuff can make you money by the way.
but what do you propose then? What is your profession?

I am a Courtesy ... ( 4 weeks ago by Poofyponcho)

I am a Courtesy Clerk at the SuperMarket!

Aha - and now you ... ( 4 weeks ago by drMerkwuerdigliebe)

Aha - and now you are looking for an assistant?
Come on. It's O.K. I'll shut up.

Hahhaa. I was just ... ( 4 weeks ago by Poofyponcho)

Hahhaa. I was just kidding to begin with :D. Wanted a reaction :D hehe

this is very ... ( 3 weeks ago by PAPERSCHOOL)

this is very interesting

:\ - begin with? ( 3 weeks ago by drMerkwuerdigliebe)

:\ - begin with?

Yeah. As in, my ... ( 3 weeks ago by Poofyponcho)

Yeah. As in, my initial remark was a joke. :D

heheheheh ( 2 weeks ago by friendlyboys09)

heheheheh

This guy needs to ... ( 1 week ago by shanebieda)

This guy needs to learn how to teach!!!
ah!!!
it drives me crazy!
you draw, than turn around, make sure the students see wat the heck your scribbling on the board and then you explain.
Hope he's not my teacher
oh... and this was very intiresting

well, at least with ... ( 1 week ago by SpoolDonkey)

well, at least with one click of the mouse you can have him repeat it as many times as you want :)

35:50 ''someone is ... ( 1 week ago by SpoolDonkey)

35:50 ''someone is going to get hit in the face with a bicycle wheel'' - WOW!
*goes to get string and wheel*

wat a teacher ..... ... ( 6 days ago by sourabhmib)

wat a teacher .............amazing......

"gyroscope" one of ... ( 6 days ago by sourabhmib)

"gyroscope" one of the toughest topic of physic.....
becomes very simple........see this video.....

holy cro, the best ... ( 6 days ago by danthemango)

holy cro, the best lesson I've ever had.

well i hope you are ... ( 10 hours ago by Jays0n54)

well i hope you are not judging with no previous knowledge like the ones the students have

Amazing class, I ... ( 7 hours ago by sebastas2)

Amazing class, I always wanted to understand how Gyros work. 5/5 right away!!