Forgive me if this is a noob question. I know there are no perfectly rigid bodies so that if you had a light-year long rod and pushed it, the other end would not move immediately because if it could, then information could be transmitted FTL. But, what if you pushed on a quark in the same manner? Would it get compressed as well for a brief moment since it would take time for the movement to reach the other side of it? I would suppose quarks can't be rigid either and it must get compressed somehow. How can you compress a quark though?