The h Bar

@Secret How does the "distance form a curve"?

What is "curved path information" and why does it need to be "retrieved"?

Distance from curve is the inf of distances to each point on the curve.

e.g. consider separation between red and black ball:

Note how it starts out far away, then became the shortest midway through the rotation, ad then became large again

@ArtOfCode he never talks when you guys are around ;-)

5:03 PM

@Sᴋᴜʟʟᴘᴇᴛʀᴏʟ nah, I'm engaging

this is where the curved information from the corotating frame is hidden in the rotating frame

@0celo7 Does she know already?

@Secret You haven't answered the question what "curved information" is.

Giving an example does not absolve you from the necessity to define what you are talking about

@0celo7 go ahead it's your time and energy

Good luck with the SO thing.

I am trying to say how we knew in the rotating frame, the ball travels in a straight line (top panal) but in the corotating frame (thus the disk is non rotating in this frame) the ball travel in a curved path

What I am trying to say up there is how can an observer see something curving in the rotating frame (and how it can see something straight in the corotating frame, thus reconciling and rationalising why it looks curved in one frame, but not in the other frame

@user36790 : er, no. He died before I was born.

user116211

5:07 PM

O.O

and thus the curived path can be described as due to a geometric effect, which manifest as a fictious force

@Sᴋᴜʟʟᴘᴇᴛʀᴏʟ : who, me? I don't care who's around.

user116211

@JohnDuffield: Your doppleganger

user116211

John Duffield (born June 1939) is the founder of Jupiter Fund Management, one of the largest fund managers operating in London. == Career == Born the son of a Doctor and educated at Harrow School, Duffield went into investment management and, having become manager of his wife's estates, moved to Switzerland as a tax exile. He founded Jupiter Asset Management in 1985. After selling Jupiter Asset Management to Commerzbank, he founded New Star Asset Management in 2001. == Family == He was married to Vivien Clore but was divorced from her in 1976; they had one son and one daughter. He now has a long...

@Secret You "reconcile" and "rationalise" that by just observing that doing the coordinate transformation into the moving frame changes the form of Newton's law such that the fictitious force appears. I'm not sure why you think saying anything more is necessary.

5:09 PM

@user36790 The only way to not see those questions over and over and over and over and over and over and over again is to get a consensus to close and delete them without mercy.

If the posters get what they want--even just a a taste of it in the comments--they will keep coming back.

@JohnDuffield then why do you keep calling them around?

This site either has to accept them or decide that it doesn't want to be that site.

@Secret : those frames don't actually exist. The ball moves towards the edge of the disc, and the disc is rotating. That's it. Its path might look straight if you're spinning with the disk, but it isn't. It's curved.

And if it goes with not being that site, it has to be ready for the complaints and the endless whinging.

user116211

@dmckee I do implement my privilege every day.

5:11 PM

Sure. But a few dozen high rep user using their close powers are not enough. You need a consensus.

@dmckee If only "the site" were an entity that could actually make such a decision :P

@ACuriousMind In that case, I kinda visualise the coordinate transformation as a side effect of my understanding, but it does helps giving an intuition on how it looks curve in one frame but straight in another. I do recall some people did ask that question when they do first year rotationa mechanics

It might be too late for that consensus, however.

user116211

@dmckee Agreed

Eternal September never ends

5:12 PM

@Sᴋᴜʟʟᴘᴇᴛʀᴏʟ : I haven't called anybody around. User36970 flagged something, and ArtofCode popped in.

user116211

@Sᴋᴜʟʟᴘᴇᴛʀᴏʟ What?

and thus the reconcilation is that when plotting the snapshots of the rotating disk against time, you would end up with a curve in both graphs

@JohnDuffield so you have NEVER called a mod in here?

@ACuriousMind does she know what?

Bernard Meurer

Wait, you can call the mods?

5:15 PM

@dmckee You already wrote "In the mean time, I'm a little confused that I seem to be accused simultaneously of over-moderating and of letting all the crap in. " back then. Consensus is impossible on this issue.

@0celo7 It's a pun on the meaning of "engage" :P

ArtOfCode

@BernardMeurer Mod flag. Same effect.

@BernardMeurer sure, by flag

@Sᴋᴜʟʟᴘᴇᴛʀᴏʟ : I've flagged some comments some time. Not that many. No big deal.

@ACuriousMind what

Bernard Meurer

Oh boy @0celo7 you be doomed dawg

5:17 PM

@0celo7 It is implied that I took "I am engaging" to mean that you are getting engaged.

Oh, I forgot I said that.

Anybody want to talk about physics? Maybe somebody wants to talk about time?

Not a big deal for YOU @JohnDuffield but you are not in here as much as those who you flag

@ACuriousMind Well, on the whole I have simple resigned myself to this being a site that supports pop-sci questions. The thing I want to know now is "Is the user base going to support them, or is it going to cater to them?"

No, she doesn't know.

5:18 PM

I've no interest in the latter case.

And I don't have the money for that either.

@BernardMeurer what