Groups > sci.physics.relativity > #408202

Why Should Gravitational Mass Equal Inertial Mass?

From	"HGW... DSc." <hgw@....>
Newsgroups	sci.physics.relativity
Subject	Why Should Gravitational Mass Equal Inertial Mass?
Date	2017-02-07 20:10 +1100
Organization	Aioe.org NNTP Server
Message-ID	<o7c2ul$scu$1@gioia.aioe.org> (permalink)

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Newton showed that a feather fell to the ground in the same time as a 
lump of lead and concluded that gravitational mass must be equal to 
inertial mass. (It didn't actually show that at all)
That might be OK for gravity but consider the electrostatic equivalent.
A proton would fall towards a negatively charged object with twice the 
acceleration as an ionized H atom.
We know that Einstein's gravitation theory differs from Newton's in that 
a factor of two appears in much of the maths.(It was only added after he 
feared that experimental evidence proved his original equations wrong).

If it was ever shown that this 'two factor' did actually exist (a very 
unlikely scenario), that would only suggest that light's inertial mass 
was NOT equal to its gravitational mass. It behaves in gravity like the 
proton does in an electric field.

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Why Should Gravitational Mass Equal Inertial Mass? "HGW... DSc." <hgw@....> - 2017-02-07 20:10 +1100
  Re: Why Should Gravitational Mass Equal Inertial Mass? moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-02-07 13:35 +0000
    Re: Why Should Gravitational Mass Equal Inertial Mass? "HGW... DSc." <hgw@....> - 2017-02-08 12:27 +1100
      Re: Why Should Gravitational Mass Equal Inertial Mass? Python <python@python.invalid> - 2017-02-08 02:35 +0100
      Re: Why Should Gravitational Mass Equal Inertial Mass? moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-02-08 04:00 +0000
      Re: Why Should Gravitational Mass Equal Inertial Mass? Odd Bodkin <bodkinodd@gmail.com> - 2017-02-08 08:43 -0600
  Re: Why Should Gravitational Mass Equal Inertial Mass? Gary Harnagel <hitlong@yahoo.com> - 2017-02-07 05:45 -0800
  Re: Why Should Gravitational Mass Equal Inertial Mass? Alan Folmsbee <omnilobe@gmail.com> - 2017-02-07 14:50 -0800
    Re: Why Should Gravitational Mass Equal Inertial Mass? Odd Bodkin <bodkinodd@gmail.com> - 2017-02-07 16:53 -0600
      Re: Why Should Gravitational Mass Equal Inertial Mass? "HGW... DSc." <hgw@....> - 2017-02-09 05:40 +1100
    Re: Why Should Gravitational Mass Equal Inertial Mass? "HGW... DSc." <hgw@....> - 2017-02-08 12:30 +1100
      Re: Why Should Gravitational Mass Equal Inertial Mass? Odd Bodkin <bodkinodd@gmail.com> - 2017-02-08 08:44 -0600
        Re: Why Should Gravitational Mass Equal Inertial Mass? "HGW... DSc." <hgw@....> - 2017-02-09 05:41 +1100
          Re: Why Should Gravitational Mass Equal Inertial Mass? Alan Folmsbee <omnilobe@gmail.com> - 2017-02-08 10:55 -0800
            Re: Why Should Gravitational Mass Equal Inertial Mass? "David (Lord Kronos Prime) Fuller" <fuller.david@hotmail.com> - 2017-02-08 11:14 -0800
            Re: Why Should Gravitational Mass Equal Inertial Mass? "David (Lord Kronos Prime) Fuller" <fuller.david@hotmail.com> - 2017-02-08 13:23 -0800
              Re: Why Should Gravitational Mass Equal Inertial Mass? alsor@interia.pl - 2017-02-08 17:39 -0800
                Re: Why Should Gravitational Mass Equal Inertial Mass? "David (Lord Kronos Prime) Fuller" <fuller.david@hotmail.com> - 2017-02-08 17:54 -0800
  Re: Why Should Gravitational Mass Equal Inertial Mass? "Paul B. Andersen" <relativity@paulba.no> - 2017-02-08 21:40 +0100
    Re: Why Should Gravitational Mass Equal Inertial Mass? "HGW... DSc." <hgw@....> - 2017-02-09 20:01 +1100
      Re: Why Should Gravitational Mass Equal Inertial Mass? "Paul B. Andersen" <relativity@paulba.no> - 2017-02-09 13:03 +0100
        Re: Why Should Gravitational Mass Equal Inertial Mass? "HGW... DSc." <hgw@....> - 2017-02-10 17:47 +1100
          Re: Why Should Gravitational Mass Equal Inertial Mass? Tom Roberts <tjroberts137@sbcglobal.net> - 2017-02-10 09:31 -0600
            Re: Why Should Gravitational Mass Equal Inertial Mass? "HGW... DSc." <hgw@....> - 2017-02-11 12:32 +1100
              Re: Why Should Gravitational Mass Equal Inertial Mass? pnalsing@gmail.com - 2017-02-10 19:08 -0800
              Re: Why Should Gravitational Mass Equal Inertial Mass? Tom Roberts <tjroberts137@sbcglobal.net> - 2017-02-10 22:37 -0600
                Re: Why Should Gravitational Mass Equal Inertial Mass? "HGW... DSc." <hgw@....> - 2017-02-12 08:38 +1100
          Re: Why Should Gravitational Mass Equal Inertial Mass? moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-02-10 18:06 +0000
            Re: Why Should Gravitational Mass Equal Inertial Mass? "HGW... DSc." <hgw@....> - 2017-02-11 12:33 +1100
              Re: Why Should Gravitational Mass Equal Inertial Mass? moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-02-11 06:16 +0000
                Re: Why Should Gravitational Mass Equal Inertial Mass? "HGW... DSc." <hgw@....> - 2017-02-12 08:42 +1100
                Re: Why Should Gravitational Mass Equal Inertial Mass? moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-02-12 06:07 +0000
                Re: Why Should Gravitational Mass Equal Inertial Mass? "HGW... DSc." <hgw@....> - 2017-02-13 20:31 +1100
                Re: Why Should Gravitational Mass Equal Inertial Mass? moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-02-13 16:31 +0000
                Re: Why Should Gravitational Mass Equal Inertial Mass? "HGW... DSc." <hgw@....> - 2017-02-14 08:45 +1100
                Re: Why Should Gravitational Mass Equal Inertial Mass? moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-02-14 02:42 +0000
                Re: Why Should Gravitational Mass Equal Inertial Mass? "Paul B. Andersen" <relativity@paulba.no> - 2017-02-14 20:44 +0100
                Re: Why Should Gravitational Mass Equal Inertial Mass? "David (Lord Kronos Prime) Fuller" <fuller.david@hotmail.com> - 2017-02-14 12:23 -0800
                Re: Why Should Gravitational Mass Equal Inertial Mass? "HGW... DSc." <hgw@....> - 2017-02-19 11:50 +1100
                Re: Why Should Gravitational Mass Equal Inertial Mass? Gary Harnagel <hitlong@yahoo.com> - 2017-02-18 21:08 -0800
  Re: Why Should Gravitational Mass Equal Inertial Mass? John Heath <heathjohn2@gmail.com> - 2017-02-09 05:43 -0800

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