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[–] 70 points 1 month ago (1 child)

Physics is a cruel mistress.

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  • [–] 56 points 1 month ago (3 children)

    Cartoon logic says it works. Real locic says the pushing cancels the pulling.

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  • [–] 40 points 1 month ago (3 children)

    Because of Newton's first rule. Similarly, an engine won’t start by itself, you have to turn it first. So just push the truck forward to give it momentum, and the magnet will continue pulling it forward

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  • [–] 30 points 1 month ago (2 children)

    How come an engine can't start its own but I can cum on my own with out turning me on first ?

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  • [–] 16 points 1 month ago (3 children)
  • [–] 3 points 1 month ago (2 children)

    Used to be that troll science comics show off things that wouldn't work in reality. Like tying a toast to a cat, so that the cat after dropping will endlessly spin in the air (buttered cat paradox).

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  • [–] 13 points 1 month ago (1 child)

    Newtons 3rd law states all forces come in pairs which act equally and in opposite directions. The magnet exerts a forward force on the truck and the truck exerts an equal force backwards on the magnet. Because the magnet is physically attached to the truck, there is no way for this to produce a non-zero net force on the system we are trying to move; so the truck will not accelerate.

    This is similar to sitting on an office chair with your feet up and trying to push yourself forward by pushing on the back of the chair with your hands. Doesn't matter how hard you push, the chair will not want to accelerate.

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  • [–] 10 points 1 month ago

    Maybe ICP can tell us.

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  • [–] 18 points 1 month ago (5 children)
  • [–] 17 points 1 month ago (3 children)
  • [–] 8 points 1 month ago (2 children)

    You have to spin the magnet on the truck real fast to turn the force acting on it into rotation. And the other magnet needs to be an electromagnet. Ok, so you need two donuts, one a web of copper, and the other a liquid conductor like gallium. And you need a big computer. And more drugs. We always need more drugs.

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  • [–] 5 points 1 month ago

    This looks like an Elon Musk concept.

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  • [–] 4 points 1 month ago

    You need someone metallic run in front of you.

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  • [–] 3 points 1 month ago (1 child)

    Magnets don't attract metal.

    Both are attracted to each other.

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  • [–] 2 points 1 month ago

    it is working?

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  • [–] 2 points 1 month ago

    Something something boot straps something something

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