It can look dumb, but I always had this question as a kid, what physical principles would prevent this?

  • @BradleyUffner
    link
    English
    244 hours ago

    The motion of the stick will actually only propagate to the other end at the speed of sound in the material the stick is made of.

    • @PieMePlenty
      link
      33 hours ago

      So when you pull on the stick and it doesnt immediately get pulled back on the other side, you are, at that instant, creating more stick?

      • @[email protected]
        link
        fedilink
        111 hour ago

        You’re not creating more stick, but you’re making the stick longer. The pressure wave in the stick will travel at the speed of sound in the stick which will be faster than sound in air, but orders of magnitude slower than light.

        Everything has some elasticity. Rigidity is an illusion . Things that feel rigid to us are rigid in human terms only.

        • @PieMePlenty
          link
          234 minutes ago

          I get it. Elasticity isn’t something you think about in the every day so it all seems rigid.

      • @[email protected]
        link
        fedilink
        72 hours ago

        It would stretch like a rubber band stretches just a lot less. Wood, metal, whatever is slightly flexible. The stick would either get slightly thinner or slightly less dense as you pulled it. Also, you won’t be able to pull it much because there’s so much stick.