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by relet 4010 days ago
The board is pushing against the ground (and the load!). If you adjust that force depending on the tilt of the board, you can move it (up to a certain point) to stay under the load.

As others have pointed out, it depends a bit on how much lateral force you can achieve through tilting and reaction forces, but if you can balance a quadcopter, you can balance a hoverboard. It gets a lot easier if your load is attached to the platform.