Can this wind-powered car defy physics?
The answer is "yes, to an extent"
The laws of physics dictate that the wind can't ever push anything faster than it is going but Derek Muller from Veritasium YouTube channel decided he should try and disprove this by taking a wind-powered 'car' to El Mirage, a dry lake in California. The 'car' in question is actually a three-wheeler (they call it a 'propeller craft'); it's called the 'Blackbird' and it was actually built precisely for this purpose.
You can easily see the massive big twin-blade turbine at the rear but there's a lot more going on underneath the minimalist bodywork. The wind-fuelled turbine gets the car moving and then the wheels turn a sprocket, which then pulls a chain, which then feeds back mechanical energy to the turbine, providing forward thrust.
In the video, you can see that the vehicle is using windpower twice. Once, by simply using windpower to move downwind, and then once more because the propeller works as a fan, hitting air molecules, pushing them backwards and generating extra thrust. The question remains: can this vehicle break physics? Probably. Or probably that's just called 'cheating'. But whatever, it's fun.