system
Given the following post, respond as if you're commenting on Reddit:
human
Can a rod with length (1 LightYear/2*pi) ever obtain angular velocity of 1 rotation/sec?

Spinning perpendicular to it's length of course.

Imagine little rockets pushing the rod at both ends, say in clockwise direction. Now, close to the center of the rod, we're travelling very slow. As the radius increases, so does the angular velocity. So much so, that if travelling at 1 rotation/sec, the ends of the rods would be travelling at the speed of light.

How does relativity apply to this situation? The rod is one straight solid object.
gpt
There is no such thing as a perfectly rigid solid object, and you've described one reason why. Any rod, no matter how rigid, will have some elasticity to it; and, if you attempt to spin it at the rate you describe, would inevitably break apart before it got to that speed. In other words, a corollary of the fact that nothing can travel faster than the speed of light is that perfectly rigid objects do not exist.