Re: Swartz letter in AJP (work-energy theorem)

[Jack Uretsky <jlu@HEP.ANL.GOV>]

What's so difficult?  A "negative coin" is colloquially known as an 'IOU".
                                                Regards,
                                                        Jack



On Fri, 3 Sep 2004, Brian Whatcott wrote:

> It's the negative coin issue  that can be a concrete difficulty,
> I reckon...
>
> B
>
> At 12:53 AM 9/3/2004, you wrote:
> >  You have 'em or you don't.
> > >  Owing money as an example of negative coins, has a conceptual
> > > precipice for them, at times, I think
> >
> > precipice?
> >
> > bc
> >
> > > > About negative work: in the world of the accounts clerk, a debit
> > > > in one column is the credit in the other with an opposite sign.
> > > > I fancy the student has a more concrete conception of coinage,
> > > > for example.
> > > > You have 'em or you don't.
> > > > Owing money as an example of negative coins, has a conceptual
> > > > precipice for them, at times, I think.
> > > The experts on Piaget's cognitive theory might have some ideas about this.
> > >
> > > Thanks for all the comments.
> > >
> > > Hugh Logan
>
> Brian Whatcott    Altus OK    Eureka!

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