"The Ghost In The Machine" <ewill@aurigae.athghost7038suus.net> wrote in
message news:7iqeo1-e1o.ln1@lexi2.athghost7038suus.net...

In sci.physics, DaveL
<dave1027@comcast.net>
 wrote
on Tue, 25 May 2004 18:31:07 -0700
<OI6dnSZVjamDbi7d4p2dnA@comcast.com>:

"The Ghost In The Machine" <ewill@aurigae.athghost7038suus.net> wrote in
message news:00ion1-21a.ln1@lexi2.athghost7038suus.net...

We can work either forward or backward.

Forward:  Brute-force a, knowing t and d.  Bear in mind d
is half the distance to the moon (the assumption being that
the lunabus will turn around halfway there and decelerate
at the same rate as it accelerated there in the first place)
and t is 4 minutes.  So we get

a = 3.84 * 10^8 m / (240^2) = 6667 m/s/s

Waaaaaay too much.

If you were really such a physics hot-shot you'd know that if gravity

were

use as a method of propulsion then G forces don't apply.

In other words, keep an open mind.

Gravity as a propulsion method might work for such things
as hot air balloons (if only because bouyancy requires it).
I doubt it would work for spacecraft.

Maybe you are misunderstanding what I mean by gravity propulsion.   You
should read up on Hal Puthoff or John Hutchison  and then develope an
imagination.  If people did not dream about what could be then we would all
still be traveling in hot air balloons instead of airplanes!


DaveL