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A screenshot of a post showing a red pickup truck with a mechanical arm structure attached to its bed, holding a magnet in front of a metal plate mounted on the front bumper, titled “Okay explain why this wouldn’t work”. Below, a comment from the official Volkswagen account reads “We sent this to the engineering department and they blocked us on teams.”

I think the reason is that the magnet is also attracted to the metal so the attraction force directions add to be net neutral
The magnet attracts the car, but the arm it’s connected to pushes back on the car, balancing the forces.
Yeah exactly