# Thread: Do all forces travel as wave?

1. My question is: do all forces travel as a wave? In essence do all forces take time to travel.

Example: If I were to push on one end of the an infinitely long rod, would it take a calculable amount of time for the other end to move?

Thanks  2.

3. Originally Posted by Rickbob My question is: do all forces travel as a wave? In essence do all forces take time to travel.
Example: If I were to push on one end of the an infinitely long rod, would it take a calculable amount of time for the other end to move?
Yes, all such "forces" move at finite speeds. If you were to push on one end of a very long rod, the "push" would travel through the material at the speed of sound, and arrive at the other end after a finite time. It is not instantaneous.  4. MODERATOR NOTE : This belongs into the Physics section. Moved.  5. wel I think if even light travels as wave ... than probably everthing travels like wave but... than again there are maybe unknown forces materias to me...  6. Originally Posted by Markus Hanke Yes, all such "forces" move at finite speeds. If you were to push on one end of a very long rod, the "push" would travel through the material at the speed of sound, and arrive at the other end after a finite time. It is not instantaneous.
But it would be instantaneous in ideal conditions, provided that we had an non-condensable rod, wouldn't it? What's the principle behind this?  7. Originally Posted by rickettsie  Originally Posted by Markus Hanke Yes, all such "forces" move at finite speeds. If you were to push on one end of a very long rod, the "push" would travel through the material at the speed of sound, and arrive at the other end after a finite time. It is not instantaneous.
But it would be instantaneous in ideal conditions, provided that we had an non-condensable rod, wouldn't it? What's the principle behind this?
This question has seen intense scrutiny over the past starting with Newtonian Mechanics of rigid bodies which supports the theoretical notion that FTL is possible if perfectly rigid bodies existed, to special relativity which forbids it.

Currently I believe that at present in relativity the tacit assumption is that no such perfectly rigid bodies can exist. In practice relativity imposes limits on the rigidity of materials attributed to the fact that rigid bodies are composites of fundamental particles and that properties such as rigidity are determined by electrical interactions between atoms and that those interactions cannot be propogated > c. :-))  8. Originally Posted by Implicate Order Currently I believe that at present in relativity the tacit assumption is that no such perfectly rigid bodies can exist. In practice relativity imposes limits on the rigidity of materials attributed to the fact that rigid bodies are composites of fundamental particles and that properties such as rigidity are determined by electrical interactions between atoms and that those interactions cannot be propogated > c. :-))
Thank you, I could not have put this any better   forces, time, waves 