In addition to the Free (inertial) Motion of particles and masses of
matter; wending, weaving, in and out, around and in between the
centers of mass of other masses; weightlessly orbiting and free
falling in space, there is only one other kind:
Forced (accelerated} Motion; where particles and masses thereof are
not moving freely; because - according to the concept of
impenetrability - they obviously cannot easily and/or freely;
simultaneously occupy, penetrate and/or pass through other particles
and masses of matter.
Masses resting on Earth's surface are in a state of Forced
(accelerated) Motion in that they are being _decelerated_, and cannot
of themselves freely fall, or gravitate to their common center of
mass; Earth's center.
So I guess the acceleration of the earth around the sun, the acceleration of the
earth/sun around the galaxy, the acceleration of the earth/sun through the local
group, all those magically don't count? There are others as well but those were
just to open your eyes.
"Xirtamwq" <[Only registered users see links. ]> wrote in message
news:[Only registered users see links. ].com...
no, any object continuously changing direction is also accelerating, so an
object moving in a circular path such as an orbit is accelerating even
though its actual speed may not be changing. acceleration is defined as
'rate of change of velocity' and as velocity encompasses speed and
direction, then a change in either or both constitutes an acceleration.
[Only registered users see links. ] (Xirtamwq) wrote in message news:<[Only registered users see links. ].com>...
Oh foolish one; who doesn't know that anything, anywhere on Earth's
surface is being displaced from; not allowed to fall under the
influence of the very real force of gravity, by the very real force
exerted by Earth's terra firma; which is constantly restraining them
at a rate of about 16 feet per second^2; a deceleration of 32 feet per
This rate of restraint and/or deceleration is not constant because of
Earth's rotation and varies at various latitudes.