Posted: Jan 17, 2022 8:49 am
by Evolving
That was very interesting, thank you for bringing that to our attention!

Definitely more unscratching than Einstein's deeply unsatisfying initial response (if https://www.quora.com/How-is-the-Ehrenfest-paradox-resolved is to be believed) that the disc (or cylinder) would break if you tried to accelerate it to relativistic speeds.