Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > sci.physics.relativity > #599668

Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up.

Show all headers | View raw

Am 15.01.2023 um 21:13 schrieb JanPB:
> On Saturday, January 14, 2023 at 11:12:54 PM UTC-8, Thomas Heger wrote:
>> Am 14.01.2023 um 11:58 schrieb JanPB:
>>> On Saturday, January 14, 2023 at 1:00:48 AM UTC-8, Thomas Heger wrote:
>>>> Am 14.01.2023 um 03:24 schrieb Tom Roberts:
>>>>> On 1/13/23 1:23 AM, Thomas Heger wrote:
>>>>>> In SRT Einstein used the velocity v, but meant velocity of an object
>>>>>> relative to space.
>>>>>
>>>>> You just keep making stuff up and pretending it is true. This is
>>>>> BLATANTLY WRONG. If you had actually read Einstein's 1905 paper on SR,
>>>>> you would know that every velocity he mentioned was relative to a
>>>>> specified set of inertial coordinates.
>>>> This 'specified set of coordinates' needs to be specidied, too.
>>>> Therefore, we need another set of specified coordinates to specify the
>>>> previous ones.
>>>>
>>>> And so on and on, with infinite regress.
>>>
>>> No. It doesn't work that way.
>> sure, infinite regress does not work.
>>
>> But what else do you suggest?
>
> It was described in Einstein's 1905 paper. It's a process with no infinite regress.

Einstein 'defined' an inertial frame as coordinate system, in which the 
equations of Newton's mechanics hold good.

I wrote, that Newton was an earthling and the surface of our home planet 
is not, what we would call 'inertial frame of reference' today.

Such inertial frames require absense of gravity, which we earthlings 
obviously cannot provide.

But in such a dark and gravity free inertial frame, you have abolutely 
nothing, which could eventually help you to measure absolute velocity.

In that scenario you always need something, where you could base your 
position vectors on.

You could place a 'buoy' somewhere as reference, but don't know its 
velocity neither.

So, you need another buoy, to reference the position of the first buoy. 
And that buoy needs an anchor, too, what lets you end up with infinite 
regress.


TH

Back to sci.physics.relativity | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Re: Kinetic Energy formula check - a series of short burn rockets,   and   see how the velocity adds up. Thomas Heger <ttt_heg@web.de> - 2023-01-12 08:31 +0100
  Re: Kinetic Energy formula check - a series of short burn rockets,   and   see how the velocity adds up. Evangelista Barzetti <magm@hyojmkib.vi> - 2023-01-12 16:45 +0000
  Re: Kinetic Energy formula check - a series of short burn rockets,   and   see how the velocity adds up. Otto Fiscella <tfit@tiselelc.it> - 2023-01-12 16:51 +0000
    Re: Kinetic Energy formula check - a series of short burn rockets,     and   see how the velocity adds up. Thomas Heger <ttt_heg@web.de> - 2023-01-13 08:23 +0100
      Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. Tom Roberts <tjoberts137@sbcglobal.net> - 2023-01-13 20:24 -0600
        Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. Maciej Wozniak <maluwozniak@gmail.com> - 2023-01-13 22:21 -0800
        Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. Thomas Heger <ttt_heg@web.de> - 2023-01-14 10:00 +0100
          Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. JanPB <filmart@gmail.com> - 2023-01-14 02:58 -0800
            Re: Kinetic Energy formula check - a series of short burn rockets,   and see how the velocity adds up. Thomas Heger <ttt_heg@web.de> - 2023-01-15 08:12 +0100
              Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. JanPB <filmart@gmail.com> - 2023-01-15 12:13 -0800
                Re: Kinetic Energy formula check - a series of short burn rockets,   and see how the velocity adds up. Thomas Heger <ttt_heg@web.de> - 2023-01-16 08:08 +0100
                Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. JanPB <filmart@gmail.com> - 2023-01-16 02:09 -0800
                Re: Kinetic Energy formula check - a series of short burn rockets,   and see how the velocity adds up. Thomas Heger <ttt_heg@web.de> - 2023-01-17 08:39 +0100
                Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. Maciej Wozniak <maluwozniak@gmail.com> - 2023-01-17 00:28 -0800
                Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. Volney <volney@invalid.invalid> - 2023-01-17 13:04 -0500
                Re: Kinetic Energy formula check - a series of short burn rockets,   and see how the velocity adds up. Thomas Heger <ttt_heg@web.de> - 2023-01-18 09:22 +0100
                Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. Maciej Wozniak <maluwozniak@gmail.com> - 2023-01-18 01:17 -0800
                Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. Volney <volney@invalid.invalid> - 2023-01-18 16:33 -0500
                Re: Kinetic Energy formula check - a series of short burn rockets,   and see how the velocity adds up. Thomas Heger <ttt_heg@web.de> - 2023-01-19 09:28 +0100
                Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. Volney <volney@invalid.invalid> - 2023-01-19 16:33 -0500
                Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. Maciej Wozniak <maluwozniak@gmail.com> - 2023-01-19 23:07 -0800
                Re: Kinetic Energy formula check - a series of short burn rockets,   and see how the velocity adds up. Thomas Heger <ttt_heg@web.de> - 2023-01-22 08:24 +0100
                Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. Volney <volney@invalid.invalid> - 2023-01-22 21:11 -0500
                Re: Kinetic Energy formula check - a series of short burn rockets,   and see how the velocity adds up. "Kevin Aylward" <kevinRemoveandReplaceATkevinaylward.co.uk> - 2023-01-23 20:49 +0000
                Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. Tom Roberts <tjoberts137@sbcglobal.net> - 2023-01-23 15:43 -0600
                Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. Maciej Wozniak <maluwozniak@gmail.com> - 2023-01-23 22:01 -0800
                Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. Thomas Heger <ttt_heg@web.de> - 2023-01-24 08:53 +0100
                Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. Maciej Wozniak <maluwozniak@gmail.com> - 2023-01-24 00:27 -0800
                Re: Kinetic Energy formula check - a series of short burn rockets, and see how the velocity adds up. Maciej Wozniak <maluwozniak@gmail.com> - 2023-01-19 00:39 -0800

csiph-web