As well, do we each have our own earth treadmill?
I just used an omnidirectional treadmill as a concept.
when the position of a body with respect to its surroundings does not change with time it is said to be "at rest". When the position of a body with respect to it's surroundings does change with time then it is is said to be moving. Things like rest and motion are 100% relative to the situation, the object, and it's surroundings.
If you start walking/driving/flying west on earth your surroundings do change with time so I would say that you, relative to your surroundings, are in motion. Multiple people being in motion will all have different frame of references for motion.
Someone sitting on an airplane heading west is not moving relative to his immediate surroundings of the airplane but is moving relative to the surface of the earth. He has a direction of travel, relative to his starting location, of west.
Someone sitting on an airplane heading east is not moving relative to his immediate surroundings of the airplane but is moving relative to the surface of the earth.He has a direction of travel, relative to his starting location, of east.
Because what happens if you and I both jet from SF and you are going West and I am going East? How does that work?
I have outlined the path west here with blue arrows:
https://forum.tfes.org/index.php?topic=14046.msg187564#msg187564I really don't want to take the time to make screenshots and draw red arrows going east. I can tell that you are intelligent and can imagine a similar scenario in which there are red arrows going east. One person follows the blue series of screenshots going west and another follows the red series of screenshots east.