$ A ROD for it's own ass.!!
You are NOT with it, in GR gtr Tivity. The GR-POiNT is it.!!
You attach a ROCKET to the TOP and a ROCKET to the BOTTOM.!!

[ CLEARLY, in GR FRAME B, you will have a STRETCHED POiNT. ]
[ ANY *STRETCHED* GR gtr Tivity-POiNT, is a GR Tivity-ROD. ]

A *STRETCHED* GR Tivity-POiNT's a *ROD*, for it's OWN ASS.!!
```Brian


wrote:
Daryl McCullough wrote:
THE ROD STARTS IN FRAME A - FRAME A IS THE INITIAL FRAME OF THE ROD
The FRAME A is ONE POiNT on a WORLDline in GR gtr Tivity SPACEtime.

e1 = the event at which the left end of the rod starts accelerating
e1 = the event at which the TOP END of a GR POiNT starts accelerating.

e2 = the event at which the right end of the rod starts accelerating
e2 = the event at which the BOTTOM END of a GR POiNT starts
accelerating.

In frame B, e2 takes place *before* e1.
In frame B POiNT-event, the BOTTOM END of a GR POiNT starts accelerating
*before* the TOP END of the SAME GR POiNT starts to accelerate ..at all.

You're not thinking physically. You have long stick. You attach
one end to a jet airplane, and the jet airplane takes off, accelerating
the stick. Of *course* the jet airplane is pulling the stick. How
else would the stick accelerate?

insert ..see top of PAGE.!!

Daryl McCullough
Ithaca, NY