Re: Cause and Effect

["D.V.N.Sarma" <narayana@HD1.VSNL.NET.IN>]

I do not think so.

As far as Newton's laws are concerned the situation is

No force --------------> No acceleration
There is force---------> There is acceleration

This is a characteristic of  a casual relationship.

The concept of force mainly arises from the subjective experience
of pushes and pulls.

The awareness of acceleration is not subjective.

Therefore since we have to proceed from known to the unknown,
force causes acceleration is only thing that is understandable and
not vice versa.

regards,

Sarma.




> At 10:33 AM 10/23/00 +0530, D.V.N.Sarma wrote:
>
> > Is it possible to make
> >
> >                         f = ma
> >
> > bidirectional with out the above equivalence [between gravitation
> > and accelerated frames]?
>
> Yes.
>
>
>
>
> This question has been asked several times in several guises.  I don't
> understand why the question comes up at all.  As I said before, pick a
> frame.  F=ma is an equation in that frame.  This applies to modern-physics
> free-falling frames.  This applies equally well to classical-physics
> frames, including the typical classroom frame, if you include the effects
> of gravity in the usual way.
>
> An equation is an equation.  All equations are symmetric.  Bidirectional.
> Always have been, always will be.
>
> If you want to express a nonsymmetric relationship, you'd better use
> something other than the "equality" operator.  Possibilities include
>          -- the arithmetic "greater-than" operator ">"
>          -- the set-theory "subset" operator
>          -- the Boolean implication operator "==>"
>          -- the Algol assignment operator ":="
>          -- and others.