On 23/08/2020 14:45, williamwright wrote:
On 23/08/2020 05:15, Rod Speed wrote:
williamwright wrote
harry wrote

https://www.youtube.com/watch?v=_QLEERYS5C8

No-one seems to know why flywheels store energy. Not really.

Bull****
https://en.wikipedia.org/wiki/Flywheel#Physics

Now you see, in your haste to be rude, you've missed my point. Why does
a moving object have energy to give away? Moving relative to what? I
personally am travelling very very fast indeed relative to certain other
bodies in the universe, but I'm stationary relative to the Earth.
That's the essence of the "twin paradox" (often misstated). If motion is
relative, why is it the twin in the spaceship who ages less fast?

--
Max Demian