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Re: Reality versus Math

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Dne 04/06/2017 v 08:07 John Gogo napsal(a):
> On Saturday, June 3, 2017 at 12:33:17 AM UTC-5, Poutnik wrote:

> 
> According to the book 'University Physics", by Sears/Zemansky/Young, 7th edition, 1987, page 28:
> 
> The term speed has two different meanings:
> 1) magnitude of the instantaneous velocity
> 2) Average quantity of a total length of path divided by elapsed time. 
> 
> In the first case there is a number value. In the second case the average velocity would be zero because the total displacement is zero.
> 
> Personally, these meanings can be improved in terms of whether they are one-way or two-way measures (I hesitate to identify measures as being velocities or speeds). I believe there may be inventions and categorizations that may better explain these higher hierarchical kinematical aspects.
> 

The first meaning is the immediate speed,
the second onee is the average speed,
the integral arithmetic mean of immediate speed over the time.

The velocity as a vector has both respective meanings as well.
There is the immediate velocity and the average velocity.
The latter has its vector components equal to time integrals
of the vector components of immediate velocity.

one way or two way speed do not bring an extra quality,
they just define a way the averaging is performed.

Two way averaging has advantage of higher accuracy
due longer path, longer interval and no need of clock synchronization.

The obvious reason for one way speed is speed anisotropy,
unless this anisotropy is ruled out, like it is for light in vacuum.

-- 
Poutnik ( The Pilgrim, Der Wanderer )

A wise man guards words he says,
as they say about him more,
than he says about the subject.

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Re: Reality versus Math Odd Bodkin <bodkinodd@gmail.com> - 2017-05-21 13:30 -0500
  Re: Reality versus Math kenseto <setoken@att.net> - 2017-05-22 04:37 -0700
    Re: Reality versus Math Odd Bodkin <bodkinodd@gmail.com> - 2017-05-22 08:25 -0500
      Re: Reality versus Math Seki Ushisa <sis@iscauhw.ea> - 2017-05-22 13:33 +0000
      Re: Reality versus Math John Gogo <jfgogo22@yahoo.com> - 2017-06-02 17:20 -0700
        Re: Reality versus Math "David (Lord Kronos Prime) Fuller" <fuller.david@hotmail.com> - 2017-06-02 17:57 -0700
          Re: Reality versus Math John Gogo <jfgogo22@yahoo.com> - 2017-06-02 19:10 -0700
            Re: Reality versus Math pnalsing@gmail.com - 2017-06-02 20:16 -0700
              Re: Reality versus Math Poutnik <poutnik4nntp@gmail.com> - 2017-06-03 07:34 +0200
              Re: Reality versus Math "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2017-06-04 14:40 -0700
            Re: Reality versus Math Poutnik <poutnik4nntp@gmail.com> - 2017-06-03 07:33 +0200
              Re: Reality versus Math Poutnik <poutnik4nntp@gmail.com> - 2017-06-03 09:40 +0200
              Re: Reality versus Math John Gogo <jfgogo22@yahoo.com> - 2017-06-03 23:07 -0700
                Re: Reality versus Math Poutnik <poutnik4nntp@gmail.com> - 2017-06-04 08:39 +0200
                Re: Reality versus Math Poutnik <poutnik4nntp@gmail.com> - 2017-06-04 09:25 +0200

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