Groups > sci.physics.relativity > #389558

Re: Zero Gravity

From	Sylvia Else <sylvia@not.at.this.address>
Newsgroups	sci.physics.relativity
Subject	Re: Zero Gravity
Date	2016-08-09 16:38 +1000
Message-ID	<e0tc2bF59e6U1@mid.individual.net> (permalink)
References	<c8f3786f-4a2a-4555-861a-901f677e8bcd@googlegroups.com> <e0rc6aFl2tgU1@mid.individual.net> <c59a2c0a-ac06-4aaa-a3ce-87e361d24d76@googlegroups.com>

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On 9/08/2016 2:57 PM, Peter Riedt wrote:
> On Monday, August 8, 2016 at 8:27:57 PM UTC+8, Sylvia Else wrote:
>> On 8/08/2016 4:45 PM, Peter Riedt wrote:
>>> Zero Gravity
>>>
>>> The gravitational force applied by the sun on each planet decreases with distance. It is 3.95750392900614E-02m/sec2 (small g) at the distance of Mercury and diminishes by a factor of 1000 with every assumed increase of distance of 10m and a corresponding decrease of orbital velocity by 10m (gsunatpl = vm^2/rm).
>>>
>>> When is it zero?
>>>
>>>            rm	                      vm	            gsunatpl
>>> 5.79092310294605E+10	4.78723311866901E+04	3.95750392900614E-02
>>> 5.79092310294605E+11	4.78723311866901E+03	3.95750392900614E-05
>>> 5.79092310294605E+12	4.78723311866901E+02	3.95750392900614E-08
>>> 5.79092310294605E+13	4.78723311866901E+01	3.95750392900614E-11
>>> 5.79092310294605E+14	4.78723311866901E+00	3.95750392900614E-14
>>> 5.79092310294605E+15	4.78723311866901E-01	3.95750392900614E-17
>>> 5.79092310294605E+16	4.78723311866901E-02	3.95750392900614E-20
>>> 5.79092310294605E+17	4.78723311866901E-03	3.95750392900614E-23
>>> 5.79092310294605E+18	4.78723311866901E-04	3.95750392900614E-26
>>> 5.79092310294605E+19	4.78723311866901E-05	3.95750392900614E-29
>>> 5.79092310294605E+20	4.78723311866901E-06	3.95750392900614E-32
>>> 5.79092310294605E+21	4.78723311866901E-07	3.95750392900614E-35
>>>
>>
>> When the planet is at the centre of the sun.
>>
>> Sylvia.
>
> Incorrect. Gravity is at maximum at the centre of the sun. At the distance of the surface of the planet from the centre it is less but not zero.
>

I encountered a physics student who made that claim.

It should be obvious that it cannot possibly be true - what would the 
direction of the force be?

Sylvia.

Thread

Zero Gravity Peter Riedt <riedt1@yahoo.co.uk> - 2016-08-07 23:45 -0700
  Re: Zero Gravity Poutnik <poutnik4nntp@gmail.com> - 2016-08-08 09:06 +0200
    Re: Zero Gravity Peter Riedt <riedt1@yahoo.co.uk> - 2016-08-08 00:25 -0700
  Re: Zero Gravity Sylvia Else <sylvia@not.at.this.address> - 2016-08-08 22:27 +1000
    Re: Zero Gravity Peter Riedt <riedt1@yahoo.co.uk> - 2016-08-08 21:57 -0700
      Re: Zero Gravity Poutnik <poutnik4nntp@gmail.com> - 2016-08-09 07:47 +0200
        Re: Zero Gravity Peter Riedt <riedt1@yahoo.co.uk> - 2016-08-09 03:14 -0700
          Re: Zero Gravity "Dono," <sa_ge@comcast.net> - 2016-08-09 09:48 -0700
      Re: Zero Gravity Sylvia Else <sylvia@not.at.this.address> - 2016-08-09 16:38 +1000
        Re: Zero Gravity "Paul B. Andersen" <relativity@paulba.no> - 2016-08-09 22:57 +0200
          Re: Zero Gravity Peter Riedt <riedt1@yahoo.co.uk> - 2016-08-09 19:11 -0700
        Re: Zero Gravity Peter Riedt <riedt1@yahoo.co.uk> - 2016-08-09 17:20 -0700
          Re: Zero Gravity "Dono," <sa_ge@comcast.net> - 2016-08-09 17:59 -0700
            Re: Zero Gravity Peter Riedt <riedt1@yahoo.co.uk> - 2016-08-09 18:42 -0700
              Re: Zero Gravity "Dono," <sa_ge@comcast.net> - 2016-08-09 20:10 -0700
              Re: Zero Gravity Odd Bodkin <bodkinodd@gmail.com> - 2016-08-10 08:36 -0500
          Re: Zero Gravity Sylvia Else <sylvia@not.at.this.address> - 2016-08-10 13:12 +1000
            Re: Zero Gravity Peter Riedt <riedt1@yahoo.co.uk> - 2016-08-10 00:56 -0700
            Re: Zero Gravity Peter Riedt <riedt1@yahoo.co.uk> - 2016-08-10 01:02 -0700
              Re: Zero Gravity Mikko <mikko.levanto@outlook.com> - 2016-08-10 11:35 +0300
                Re: Zero Gravity Peter Riedt <riedt1@yahoo.co.uk> - 2016-08-10 02:30 -0700
              Re: Zero Gravity Odd Bodkin <bodkinodd@gmail.com> - 2016-08-10 08:53 -0500
          Re: Zero Gravity Odd Bodkin <bodkinodd@gmail.com> - 2016-08-10 08:35 -0500
      Re: Zero Gravity Odd Bodkin <bodkinodd@gmail.com> - 2016-08-09 07:07 -0500
        Re: Zero Gravity Peter Riedt <riedt1@yahoo.co.uk> - 2016-08-10 02:41 -0700
          Re: Zero Gravity Gary Harnagel <hitlong@yahoo.com> - 2016-08-10 04:12 -0700
          Re: Zero Gravity Odd Bodkin <bodkinodd@gmail.com> - 2016-08-10 08:55 -0500
    Re: Zero Gravity Poutnik <poutnik4nntp@gmail.com> - 2016-08-09 07:39 +0200

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