> But again ... reveals a possible misconception in the making.
> Negative acceleration is NOT slowing down or deceleration.
> Negative acceleration can be ...
Physician, heal thyself!
To speak of negative accelerations (in a physics context) is
to foster horrible misconceptions.
-- Negative means "less than zero" and since the less-than
operator cannot apply to vectors there cannot be a
negative acceleration (except perhaps in the peculiar case
of D=1, and even then it is recommended to speak of
direction-and-magnitude rather than sign-and-magnitude).
-- The magnitude of the acceleration cannot be negative, for
obvious reasons.
Perhaps some _component_ of the acceleration may be negative,
but if you mean to talk about components you have to say
what you mean.
This posting is the position of the writer, not that of Velikovsky or
von Däniken.
This posting is the position of the writer, not that of SUNY-BSC, NAU or the AAPT.