Bill Miller wrote:
> "Spaceman" <spaceman@[EMAIL PROTECTED]
> wrote in message
> news:MtGdnScK_upVu8DVnZ2dnUVZ_q7inZ2d@[EMAIL PROTECTED]
>> Bill Miller wrote:
>>> For example, for many years, Newton's Law fell into the "Law"
>>> category. Not anymore.
>>
>> Sorry to quibble Bill,
>> What law of newtons became not a law anymore?
>> Perpetual motion designers all over the world would like to know
>> so they can "break" all of his laws by simply jumping over one.
>> :)
>>
>> --
>> James M Driscoll Jr
>> Spaceman
>>
>>
>> Hello Spaceman. No quibble... just an example of how teaching has
>> not kept pace with reality. Here goes:
>
> One of the fundamental laws of mechanics is Newton's law of action and
> reaction, usually stated as : "Whenever a body exerts a force
> (action) on a second body, the second body exerts an equal and
> opposite force (reaction) on the first body."
>
> Suppose that a stationary mass is located in the gravitational field
> of another, distant stationary mass.The two m***** exert equal and
> opposite forces on each other. (Action and reaction) Let us now
> allow one mass to move under the action of the field of the other
> mass. ut the second mass, being far away, does not yet "know
> that the first mass has moved. (gravity -- like light -- cannot
> propagate instantaneously.) The second body continues to experience
> the same force as before.
Bill, I am sorry you have been fooled by the described situation
Newtons force theory has to include every object in between
also.
When every action-reaction of the object is considered, it has never been
wrong.
The example given is "ignoring" action-reaction of all in between
the two objects.
> In other words, the forces are now unequal in magnitude and direction
> and Newton's action/reaction law no longer holds! Further, this
> situation also is in conflict with the very basic law of conservation
> of momentum.
Every action/re-action in between have balanced.
Forces have caused "objects that would transfer the force
to transfer to a different direction, and not enough force
was transmitted all the way to cause the re-action you were hoping for.
Newton still holds true if each and every action-reaction is considered
in between.
> For a detailed analysis of this, and other Newtonian flaws, please see
> Jefimenko's "Causality, Electromagnetic Induction and Gravitation" OR
> "Gravitation and Cogravitation."
Again,
This is not a newton flaw, it is a flaw of the understanding of the newton
law.
Each and every single object in between must be considered.
You can not ignore the action-reactions that take place in between
the two objects like such is being done to come up with
the supposed violation.
Try this one in a much simpler form but almost like the gravity
problem...
Lets use air.
Air between two objects on the ground.
Would the air transfer all the motion of an object
that is 5 ft away from another object?
No, simply because all the force of the action-reactions
are diverted by the air but all action re-action of the air
follows Newton's law very well.
the same holds true for gravity.
:)
> BTW, Timo questioned my assertion that F = MA was also "leaky." I
> THOUGHT that the above also affected this equation. After further
> review... Timo's right... so far!
Action-reaction of Newton law still holds true if
all such action-reactions in between are considered.
> I hope this helps!
I hope what I babbled probably too many times just now,
helps you understand that Newton still holds fine and no
problem has occured that Newton has been proven wrong
in such.
(Missing forces is the only way he is ever proven wrong)
and missing forces only proves that someone is not following
Newton the way they really should.
After all any force at all, is a force and not only the ones
Newton haters want to pick are the only forces.
:)
> BTW, yes, a glass is simultaneously 20% empty and 80% full, but
> entirely too many people (IMNTBHO) ignore the fullness and
> concentrate only on the empitiness. And that's kinda sad!
Yes, it is sad..
I always try to think of both sides of the story.
It is much safer to do so also.
:)
I am sorry for babbling but I have never seen Newton's
Laws to be wrong.
and that is why I always follow him and think about each
and every force (action-reaction) that could occur.,,
also if I don't follow such being mechanically minded... I could be
killed.
Newton has saved my life a few times.
I am sure he probably has saved a lot of peoples lives by coming
up with such beautiful laws that have not actually been broken ever.
:)
--
James M Driscoll Jr
Spaceman
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