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Re: the impossible wheel

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Thomas 'PointedEars' Lahn wrote:

> RichD wrote:
>> Consider a rolling wheel, with rubber tire.  It's non-ideal,
>> the rubber flattens at the bottom, maybe an inch.
>> 
>> The tire, over the contact interval, works as planned:
>> it doesn't slide, relative to the road.   Which means it's
>> at rest, relative to the road.
> 
> No, it is not.  Instead, it would remain at rest relative to the road if
> it slid completely and would not “flatten at the bottom”.

I can see that this wording, in which I attempted to interpret and adopt 
"RichD’s" (wrong) definition of “at rest relative to …” was confusing.  Just 
assume that I did not write that, and assume that I meant the same as I 
wrote and meant subsequently:

Neither a wheel that is rolling nor a wheel that is sliding is ever at rest 
relative to the road, because both are kinds of motion.

What remains constant in both cases (ideally) is only the distance that the 
wheel has to the road (e.g. the distance of its center to a point on the 
road obtained from a line perpendicular to the road through the center of 
the wheel).  But that is NOT how we define “at rest relative to a road” 
*along* which the wheel must move.
 

PointedEars
-- 
A neutron walks into a bar and inquires how much a drink costs.
The bartender replies, "For you? No charge."

(from: WolframAlpha)

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Re: the impossible wheel Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2022-04-21 19:29 +0200
  Re: the impossible wheel RichD <r_delaney2001@yahoo.com> - 2022-04-21 12:11 -0700
    Re: the impossible wheel Odd Bodkin <bodkinodd@gmail.com> - 2022-04-21 19:18 +0000
      Re: the impossible wheel Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2022-04-21 22:03 +0200
      Re: the impossible wheel RichD <r_delaney2001@yahoo.com> - 2022-04-22 12:36 -0700
        Re: the impossible wheel Odd Bodkin <bodkinodd@gmail.com> - 2022-04-22 19:40 +0000
    Re: the impossible wheel Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2022-04-21 21:53 +0200
  Re: the impossible wheel Sam Kaloxylos <neeo@kzynutyj.ye> - 2022-04-21 20:36 +0000
    Re: the impossible wheel Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2022-04-22 00:39 +0200
      Re: the impossible wheel Sam Kaloxylos <neeo@kzynutyj.ye> - 2022-04-21 22:50 +0000
        Re: the impossible wheel Paul Alsing <pnalsing@gmail.com> - 2022-04-22 06:47 -0700
          Re: the impossible wheel Kye Egonidis <qliz@xuelxjxk.io> - 2022-04-22 21:30 +0000
      Re: the impossible wheel snipeco.2@gmail.com (Sn!pe) - 2022-04-22 01:18 +0100

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