Could a hover board like in back to the future realy work?
Answers:
It's a feasible idea but we aren't quite there yet.
The pull of gravity is inherently quite weak, in fact one of the weakest. Say when you jump up, you are using your own muscles to defy gravity, which you can do rather easily, considering a human's weight and the comparitive strength of your muscles to say, the earth. The problem lies in the fact that it is constant, so in order to weaken it's effect on an object you would need a constant force that must constantly assess the pull of gravity and counter it exactly. Traditional hover craft using air use this by constantly pushing air into a surface like the ground or water, and that constant push lifts it up enough to glide on the cushion of air. A hovering platform liekin Back to the Future would require a force that generates an inherent pull upwards without relying on the ground as a point from which to push from. The best option available from this comes from electromagnetism
I'm sure you know that magnets of the same terminal repel each other, and run ninga current through certain metal materials makes them magnetic for only the duration the current is in them. If the force of repellent could be adjusted to accuracy, and two opposing terminals could have different strengths that could be altered, hovering devices are posible.
Imagine a sheet of electromagnetic material on the bottom of say, a skateboard, and another sheet of the same terminal charge above it. If both push agaisnt each other at the same force, the board goes nowhere. But since gravity is constant it pulls the board down. Now imagine the top sheet pushes harder at exactly the right amount to combat both the bottom sheet and gravity, then the board hovers. But things such as the weight of a person, air movements and such means the top sheet would have to constantly recalculate the force needed. And it's power source needs to be constant.
yes ,if some one made one
If you are really interested in this check the early platform design by Hiller, a US helicopter designer The propeller was under your feet, but even with the better motors of today, there are weight/energy and stabilization issues. A more feasible solution to overcome traffic congestion is the California Hallitube initiative..google hallitubes.
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