Quote:
Originally Posted by GspotProductions
Agreed, inertia. Although, wouldn't there still be brakes inside, the tyre still touches the ground 
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the wheels are empty balls they do not have mechanical components inside nor are they structurally connected to the vehicle...the car is supposed to levitate over the wheels...
mechanical friction brakes, brake-pad on metal, have enormous power...a car weighs a lot and reaches relatively high speeds, this gives it considerable kinetic energy..
kudos to them if they have solved the braking problem using non friction brakes...