Viewing a single comment thread. View all comments

PefferPack t1_j0fu27b wrote

Reply to comment by Quartersharp in Does rotation break relativity? by starfyredragon

>it is doing a tiny amount of work by staying intact while rotating, because its outer parts have to keep changing direction

Really? This is kindof mind-blowing if true. Work is force dot displacement, so if there's no displacement in the radial direction, then there's no work done. If the body can be considered rigid then there is no radial displacement. Even in a flexible body, there would only be a short transient period of radial displacement as it stretches out from the rotational forces.

2

wasmic t1_j0g1tt6 wrote

Yeah, I don't think there's a connection between gravitational waves here, and there's no work being done to keep a rotating object together.

Gravitational waves are not emitted from spherically or cylindrically symmetric objects, either (provided the cylindrical axis is the rotational axis).

6