Re: [Phys-l] friction

[Bernard Cleyet <bernardcleyet@redshift.com>]

"... and the water at the interface,"

Icy, stone warmers sell well in Calgary.  I doubt if a warm stone would stay such long enuff to make a diff.  Certainly pressure liquefaction just doesn't happen *.  


http://pubs.acs.org/cgi-bin/abstract.cgi/jpchax/1983/87/i21/f-pdf/f_j100244a034.pdf?sessid=999


Well, for me the flash clip of a thrown stone wouldn't work, but you can game play there:



http://www.offdarock.com/games/virtualCurling.cfm


This site claims brushing melts the ice, really?


http://www.offdarock.com/games/virtualCurling.cfm

OTOH:


http://en.wikipedia.org/wiki/Image:Surface_of_ice_Ih.jpg


curling tests w/ various edge diameters, cup depths, and weights:


http://www.alpinecurling.com/stone10.html



* I calc. the pressure is ~ 13 psi



bc





jbellina wrote:

> This is such a complicated situation given variations in temperature,  
> pressure on the ice, and the water at the interface, I don't think  
> you will find a value that is much good for anything.  Most  
> coefficients are for dry surfaces just because the liquid interface,  
> ie lubrication complicates matters enormously.
>
> joe
>
> Joseph J. Bellina, Jr. Ph.D.
> Professor of Physics
> Saint Mary's College
> Notre Dame, IN 46556
>
> On Oct 19, 2006, at 2:22 PM, Anthony Lapinski wrote:
>
>  
>
> > Yes. I just wanted an value for granite on "smooth" ice. I realize  
> > there
> > will be variations depending on the ice surface.
> >
> > Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>  
> > writes:
> >    
> >
> > > Doesn't it vary a bit because of the teammembers that sweep with the
> > > brooms?
> > >
> > > Matt
> > >
> > >
> > > On 10/19/06, Anthony Lapinski <Anthony_Lapinski@pds.org> wrote:
> > >      
> > >
> > > > Does anyone know where I can find an extensive table of  
> > > > coefficients of
> > > > friction? Specifically, I want to know the coefficient of kinetic
> > > >        
> > > friction
> > >      
> > >
> > > > for granite on ice (for a question about curling). Knowing the track
> > > > length, one can determine the initial speed of the stone. I've  
> > > > searched
> > > > the web for this value of mu, but could not find it.
> > > >
> > > > _______________________________________________
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> > > >
> > > >        
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> > >      
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> >    
>
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