If I have solid rod several light year long and I push one of the ends. How long will it take for the other end to be pushed?

Question

Will it take years for the “movement” to be felt from the other end?

In: 19

Answer 1

Depends on the material.

If you have something squishy like rubber, more energy will go into compressing it than moving it.

Can someone confirm or disprove my theory? If you had some perfectly rigid material that couldn’t squish under pressure (and would instead shatter) then it would go instantly? Or at the speed of light?