Will Pushing One End of a 2 Light Second Rod Move the Other End?

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SUMMARY

The discussion centers on the physics of a hypothetical 2 light second long metal rod in space. When one end of the rod is pushed, the other end does not move after 2 seconds due to the limitations of signal transmission through the material. Instead, the propagation of the push is constrained by the speed of sound in the rod's material, which is significantly slower than the speed of light. This establishes that mechanical signals cannot travel instantaneously across such distances.

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waht
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Let's say you have a metal rod in space that is 2 light seconds long. If you push one end of the rod, would they other end move 2 seconds later?
 
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It would take a LOT longer than that, since the signal could only travel at the speed of sound in the material.
 

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