• Kolgeirr@sh.itjust.works
    link
    fedilink
    arrow-up
    20
    ·
    11 months ago

    Because the magnet is attached to the truck bed, so the bumper is being pulled forward and the bed pushed back, and the forces cancel out to 0.

    • edric@lemm.ee
      link
      fedilink
      arrow-up
      1
      ·
      11 months ago

      Dumb follow up question. If there’s a way to reverse the direction the bed is being pushed, with gears or something, will that work? lol

      • Peppycito@sh.itjust.works
        link
        fedilink
        arrow-up
        16
        ·
        11 months ago

        You need a catapult in the back to fling the magnet ahead of you, you get pulled forward, pick up the magnet and fling it again. This technology has existed since the '20s but Big Internal Combustion Engine is repressing the tech.

      • Bytemeister@lemmy.world
        link
        fedilink
        Ελληνικά
        arrow-up
        3
        ·
        11 months ago

        Sure, but you’ll need something to turn the gears.

        Typically, we use a crank that converts a reciprocating motion into a rotation. Then we move a piston up and down by putting a little explosion at one end. Connect it to a tank of explosive fuel and badaboom, perpetual motion, as long as you have explosive fuel in the tank of course.

      • LastYearsPumpkin@feddit.ch
        link
        fedilink
        English
        arrow-up
        3
        ·
        11 months ago

        No, because in the end, something needs to keep moving the magnet forward to keep the truck moving forward.

        This thought processes is exactly how scammers on YouTube make perpetual motion seem possible, but by definition, the forces always have to cancel out.