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Re: Reactionless Action Mechanism for Aerospace

From Sylvia Else <sylvia@not.at.this.address>
Newsgroups sci.physics
Subject Re: Reactionless Action Mechanism for Aerospace
Date 2017-05-21 11:54 +1000
Message-ID <eocab1Fgp6iU2@mid.individual.net> (permalink)
References (4 earlier) <343a1a56-7578-42a7-b7e9-98ff5e396540@googlegroups.com> <eo9l7aFsjdhU1@mid.individual.net> <89bb7475-f3f2-4c1f-9c94-78f00966f93d@googlegroups.com> <eoc3q4Ffi2nU1@mid.individual.net> <5920f28d$0$54216$c3e8da3$12bcf670@news.astraweb.com>

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On 21/05/2017 11:51 AM, benj wrote:

> Newton's third law is obviously bogus! Say you have two planets. And the
> gravity of each is in equilibrium with each other. And then one of them
> suddenly moves. Well it still keeps feeling the gravity from the first
> one but the changes due to the movement of the second one take TIME to
> reach the first planet so there is an Imbalance! The Law is bogus! That
> is unless you do not believe in relativity and think that gravity acts
> as a non-local force. One of the two has to be wrong.
>
The problem with that argument is the "suddenly moves". If it moves, 
which in this context means accelerates, then some force must be applied 
to it. We have to account for that force, including finding the 
corresponding force on another body, or demonstrating that there is no 
such body (which would violate Newton's laws). Only then can we look at 
the overall system to see whether it's complying with the laws.

Sylvia.

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Thread

Re: Reactionless Action Mechanism for Aerospace Sylvia Else <sylvia@not.at.this.address> - 2017-04-23 10:09 +1000
  Re: Reactionless Action Mechanism for Aerospace AbhiJeet Patil <abhiriksh@gmail.com> - 2017-05-18 22:08 -0700
    Re: Reactionless Action Mechanism for Aerospace Sylvia Else <sylvia@not.at.this.address> - 2017-05-19 20:26 +1000
      Re: Reactionless Action Mechanism for Aerospace AbhiJeet Patil <abhiriksh@gmail.com> - 2017-05-19 07:01 -0700
        Re: Reactionless Action Mechanism for Aerospace Odd Bodkin <bodkinodd@gmail.com> - 2017-05-19 11:56 -0500
          Re: Reactionless Action Mechanism for Aerospace AbhiJeet Patil <abhiriksh@gmail.com> - 2017-05-20 07:12 -0700
            Re: Reactionless Action Mechanism for Aerospace Odd Bodkin <bodkinodd@gmail.com> - 2017-05-21 13:19 -0500
              Re: Reactionless Action Mechanism for Aerospace AbhiJeet Patil <abhiriksh@gmail.com> - 2017-07-03 22:43 -0700
              Re: Reactionless Action Mechanism for Aerospace AbhiJeet Patil <abhiriksh@gmail.com> - 2017-07-03 22:57 -0700
        Re: Reactionless Action Mechanism for Aerospace Sylvia Else <sylvia@not.at.this.address> - 2017-05-20 11:42 +1000
          Re: Reactionless Action Mechanism for Aerospace AbhiJeet Patil <abhiriksh@gmail.com> - 2017-05-20 07:20 -0700
            Re: Reactionless Action Mechanism for Aerospace Sylvia Else <sylvia@not.at.this.address> - 2017-05-21 10:03 +1000
              Re: Reactionless Action Mechanism for Aerospace benj <nobody@gmail.com> - 2017-05-20 21:51 -0400
                Re: Reactionless Action Mechanism for Aerospace Sylvia Else <sylvia@not.at.this.address> - 2017-05-21 11:54 +1000
                Re: Reactionless Action Mechanism for Aerospace benj <nobody@gmail.com> - 2017-05-20 22:23 -0400
              Re: Reactionless Action Mechanism for Aerospace AbhiJeet Patil <abhiriksh@gmail.com> - 2017-05-21 05:31 -0700
                Re: Reactionless Action Mechanism for Aerospace Serg io <invalid@invalid.com> - 2017-05-21 09:47 -0500

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