On Sunday, September 14, 2025 at 1:52:35 AM UTC-6 Alan Grayson wrote:
On Saturday, September 13, 2025 at 9:20:03 PM UTC-6 Brent Meeker wrote: 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 *You're not listening. Firstly, you claim you want to solve the TP without GR and without accelerating, yet you're invoking GR right here, directly. Secondly, I know about E's happy thought. But frankly I don't see how anyone can claim there's no accelerating when it's staring you in the face? I wonder how E resolved his happiest thought when accelerating surely exists in GR! It's still DEFINED as change in velocity AG* *No question about it. You're a F'ing genious! Anyone with eyes can SEE it's accelerating. And any high school student of physics can MEASURE its acceleration, but the resident Relativity expert, PH'D in physics from the University of Texas, Austin, about the best university in the WORLD for PHYSICS, says it's NOT accelerating. AG * *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* -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/everything-list/aa1c092e-2c8f-4433-b636-90520597c53en%40googlegroups.com.
