• Matombo@lemmy.world
    link
    fedilink
    English
    arrow-up
    45
    ·
    5 months ago

    Fun at partys guy: While the car will actually experience a force torwards the magnet, so will the magnet experience an equal amount of force torwards tha car. Given the connection between the car and the magnet is stiff, these opposing forces will stress the connection and create a reactive force in there according to Newtens 3rd law, ultimatly canseling the forces out and neither the car nor the magnet will move.

    If you however remove the stiff connection, the car and the magnet will move torwards each other untill they meet.

    • affiliate@lemmy.world
      link
      fedilink
      English
      arrow-up
      7
      ·
      5 months ago

      what if you just attach a second magnet to the car so that it pulls the first magnet forwards?

    • voodooattack@lemmy.world
      link
      fedilink
      English
      arrow-up
      5
      ·
      edit-2
      5 months ago

      How about if you launch a huge magnet well above escape velocity and remotely anchor a space elevator made from a ferromagnetic material to it but the space elevator’s weight counteracts its inertia exactly and holds it in place perpetually. Would that work?

      Edit: I swear I’m not dumb, I just didn’t think this one through.

  • credo@lemmy.world
    link
    fedilink
    English
    arrow-up
    44
    ·
    5 months ago

    It will, but why do you want the truck to attract the magnet? Are you going to drive backwards everywhere?

  • regdog@lemmy.world
    link
    fedilink
    English
    arrow-up
    32
    ·
    5 months ago

    This illustration does not imply that the car is moving. There are no “speed lines” or arrows that would indicate that.

    So the illustrated setup would 100% work.

  • prime_number_314159@lemmy.world
    link
    fedilink
    English
    arrow-up
    25
    arrow-down
    1
    ·
    5 months ago

    I built a scale model to prove the haters wrong. I had to tilt the platform a little for it to overcome friction, but once I did, the car rolled forward until it hit a wall.

  • snooggums@midwest.social
    link
    fedilink
    English
    arrow-up
    16
    arrow-down
    1
    ·
    5 months ago

    Because both of the magnet’s poles are pointed at the car and the attraction and repulsion are canceling each other out.

  • Feathercrown@lemmy.world
    link
    fedilink
    English
    arrow-up
    17
    arrow-down
    2
    ·
    5 months ago

    What’s funny is this would actually work if you just pointed the magnet at other people’s cars.

  • idunnololz@lemmy.world
    link
    fedilink
    English
    arrow-up
    15
    arrow-down
    2
    ·
    edit-2
    5 months ago

    It’s actually a common misconception that magnets always attract metal. This misconception was popularized by people joking that magnets are magic. In reality, magnets attract because they have magnetions in them. These magnetions allow them to attract things like metal but a little bit is used up each time. Eventually once the magnet’s magnetions have been depleted, the magnet turns back into a newt and goes home to recharge.

  • LemmyKnowsBest@lemmy.world
    link
    fedilink
    English
    arrow-up
    10
    arrow-down
    1
    ·
    5 months ago

    because the truck is self-propelled, and it can only go as fast as it takes itself. Therefore the magnet, which is attached to the truck, can only go as fast as the truck takes itself.

  • iAvicenna@lemmy.world
    link
    fedilink
    English
    arrow-up
    5
    ·
    edit-2
    5 months ago

    For the same reason why this device does not go left by the metal slab pulling the magnet to the left