All changes in velocity are either acceleration of the observers and/or acceleration of that which they observe

From: Donald G. Shead (dcshead_at_charter.net)
Date: 07/29/04 

Date: 29 Jul 2004 15:31:42 -0700

Accelerated free falling observers will see the ground accelerating
upward toward them; while observers on the ground will see the free
fall as increases in the velocity of what they observe free falling
toward them.

That's what relativity's all about.

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