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Re: the famous formula

From Thomas Heger <ttt_heg@web.de>
Newsgroups sci.physics.relativity
Subject Re: the famous formula
Date 2018-12-10 18:48 +0100
Message-ID <g77n6uF84a3U1@mid.individual.net> (permalink)
References (7 earlier) <2fc5dd4e-1d1b-41bc-a65b-b6389a593107@googlegroups.com> <g72cn4F2stjU1@mid.individual.net> <puh2dj$ei8$1@dont-email.me> <g755jaFlh6sU1@mid.individual.net> <pujq5r$kp4$1@dont-email.me>

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Am 09.12.2018 um 20:24 schrieb Libor Striz:

>>
>> work is NOT 'forth times path'
>>
>> but ' force times distance'.
> 
> Well, that is definition of work from physics lessons
> of the 8th grade of the basic school.
> 
> Students of a high school are taught
> work is force times distance' times cosine of their angle.

Sorry, no.

The angle is meant as the angle between the applied force and the actual 
movement. Even if this is correct, the force in the equation

work =force times distance

is meant - of course - as the component of the force in the actual 
direction of movement.

> 
> Students at a collage or a university already know that magnitude
>   and direction of force can be variable
> and the path the force is acting along need not to be straight.
> 
> Therefore the integral definition of work along a generally curved
>   path - the endpoint distance can be even zero
> - is the path integral of force
> W = integral (path L)[ vec_F . vec_dL]
> Where .  means scalar aka dot product of vector F and vector dL.
> 
Now you provided a mathematical proof, that collages produce brainwashed 
zombies.


> Imagine you are walking across a forest along a curved path.

'Scary'...

So they scare the poor students, to believe in any nonsense they are 
supposed to swallow.



TH

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the famous formula RichD <r_delaney2001@yahoo.com> - 2018-12-06 10:49 -0800
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  Re: the famous formula dlzc <dlzc1@cox.net> - 2018-12-06 11:43 -0800
    Re: the famous formula RichD <r_delaney2001@yahoo.com> - 2018-12-07 10:15 -0800
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          Re: the famous formula dlzc <dlzc1@cox.net> - 2018-12-09 15:23 -0800
            Re: the famous formula Libor Striz <poutnik@privacy.net> - 2018-12-10 09:54 +0100
              Re: the famous formula dlzc <dlzc1@cox.net> - 2018-12-10 05:43 -0800
                Re: the famous formula Tom Roberts <tjroberts137@sbcglobal.net> - 2018-12-12 11:08 -0600
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                Re: the famous formula RichD <r_delaney2001@yahoo.com> - 2018-12-19 13:06 -0800
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            Re: the famous formula Tom Roberts <tjroberts137@sbcglobal.net> - 2018-12-14 12:21 -0600
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  Re: the famous formula Thomas Heger <ttt_heg@web.de> - 2018-12-06 20:50 +0100
    Re: the famous formula Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-06 22:47 +0100
      Re: the famous formula Thomas Heger <ttt_heg@web.de> - 2018-12-07 12:06 +0100
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                Re: the famous formula Libor Striz <poutnik4REMOVEnntp@CAPITALSgmail.com.INVALID> - 2018-12-08 19:26 +0100
                Re: the famous formula Thomas Heger <ttt_heg@web.de> - 2018-12-09 19:35 +0100
                Re: the famous formula Libor Striz <poutnik4REMOVEnntp@CAPITALSgmail.com.INVALID> - 2018-12-09 20:24 +0100
                Re: the famous formula Thomas Heger <ttt_heg@web.de> - 2018-12-10 18:48 +0100
                Re: the famous formula Rich Carpenter <lcug@kigcohc.pa> - 2018-12-10 19:37 +0000
                Re: the famous formula Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-10 22:27 +0100
                Re: the famous formula Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-10 22:35 +0100
                Re: the famous formula Thomas Heger <ttt_heg@web.de> - 2018-12-12 16:45 +0100
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                Re: the famous formula Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-09 19:03 +0100
                Re: the famous formula Libor Striz <poutnik4REMOVEnntp@CAPITALSgmail.com.INVALID> - 2018-12-09 20:37 +0100
                Re: the famous formula Odd Bodkin <bodkinodd@gmail.com> - 2018-12-09 22:20 +0000
                Re: the famous formula Thomas Heger <ttt_heg@web.de> - 2018-12-10 18:40 +0100
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                Re: the famous formula "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2018-12-18 05:33 -0800
                Re: the famous formula Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-22 14:51 +0100
                Re: the famous formula "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2018-12-22 15:30 -0800
                Re: the famous formula Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-23 01:34 +0100
                Re: the famous formula Odd Bodkin <bodkinodd@gmail.com> - 2018-12-10 21:41 +0000
                Re: the famous formula Thomas Heger <ttt_heg@web.de> - 2018-12-11 16:31 +0100
                Re: the famous formula Odd Bodkin <bodkinodd@gmail.com> - 2018-12-11 18:24 +0000
                Re: the famous formula Thomas Heger <ttt_heg@web.de> - 2018-12-12 16:32 +0100
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                Re: the famous formula Thomas Heger <ttt_heg@web.de> - 2018-12-15 19:50 +0100
                Re: the famous formula Odd Bodkin <bodkinodd@gmail.com> - 2018-12-15 20:33 +0000
                Re: the famous formula Thomas Heger <ttt_heg@web.de> - 2018-12-17 11:13 +0100
                Re: the famous formula Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-18 04:45 +0100
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                Re: the famous formula Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-15 22:02 +0100
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                Re: the famous formula Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-08 20:14 +0100
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                [OT] Work (was: the famous formula) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-08 21:53 +0100
                Re: [OT] Work Thomas Heger <ttt_heg@web.de> - 2018-12-09 19:08 +0100
                Re: [OT] Work Libor Striz <poutnik4REMOVEnntp@CAPITALSgmail.com.INVALID> - 2018-12-09 19:31 +0100
                Re: [OT] Work Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-09 18:58 +0100
                Re: [OT] Work Thomas Heger <ttt_heg@web.de> - 2018-12-10 18:52 +0100
                Re: [OT] Work Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-10 22:28 +0100
                Re: [OT] Work Thomas Heger <ttt_heg@web.de> - 2018-12-11 16:36 +0100
                Re: [OT] Work Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-11 20:24 +0100
                Re: the famous formula Gary Harnagel <hitlong@yahoo.com> - 2018-12-08 14:02 -0800
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                Re: the famous formula Libor Striz <poutnik4REMOVEnntp@CAPITALSgmail.com.INVALID> - 2018-12-08 19:34 +0100
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  Re: the famous formula Odd Bodkin <bodkinodd@gmail.com> - 2018-12-07 16:07 +0000
    Re: the famous formula Steve BH <sbharris@gmail.com> - 2019-01-01 17:22 -0800
  Re: the famous formula Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-07 22:47 +0100
  Re: the famous formula "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2018-12-09 15:06 -0800
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