On 9/13/2025 12:42 PM, Alan Grayson wrote:
*
*
*Your problem with the turnaround scenario is that you have apparently
forgotten high school physics, where velocity is a vector having
magnitude and direction, and **acceleration, which you want to avoid,
is DEFINED as a change in velocity. Hence, **anything subject to a
gravitational field is generally accelerating. *
In GR free-fall is not accelerating. It is following the geodesic
(straightest possible) path thru spacetime.
Brent
*Also, you're invoking GR when you claim there are no forces,
presumably thinking that since F=ma, there can't be any acceleration
in GR. I know that E's major insight was that gravity isn't a force,
so invoking this insight is presumably why you claim there's no
acceleration in the turnaround. But there is! It's undeniable. I can't
find any error in your triplet scenario. AG*
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