I'm gonna lean into newtons third law here. When you pass a magnet through a coil the coil also pushes back on the magnet. So magnets in the ground would essent

I'm gonna lean into newtons third law here. When you pass a magnet through a coil the coil also pushes back on the magnet. So magnets in the ground would essentially be brakes and not a source of "free energy" for the car. That's basically what regen braking is anyways.