3) Spinning wheels can be connected to a propeller causing the propeller to spin. There is no law of physics being broken here.
Quote:3) Spinning wheels can be connected to a propeller causing the propeller to spin. There is no law of physics being broken here.
You are taking energy away from the car to spin the blades
How the hell can our school not teach basic science any better then this????
You seem to be the more close-minded one, since you refuse to acknowledge the possibility that the experiment was genuine.
Car accelerates until force from the wind equals friction from the wheels. Yes?
Bzzt! Wrong! You aren't taking energy from the car, but from the Earth. For the intents and purposes of the propeller, the car is standing still. The wind has nothing to do with the propeller at all.
If you have a wind of 14 MPH the force on the car at the start would be 4 times what it is as the car reach 7 MPH in the direction of the wind for example.
Yes with the understanding that the force of the wind is decreasing with the square of the speed of the car along the wind vector.
Taking energy from the earth indeed.
Also, your equations are the classic "frictionless plane" format.
No, you're not going to go faster than the wind unless you are still drawing power from the wind.
It seems to me that if you are counting on getting energy from the wind, then the amount of energy you could obtain comes from the delta velocity between yourself and the wind (in the direction the wind is blowing) times the surface area the wind impinges upon. I don't see how you can possibly take energy from the wind if you are running faster than the wind. In that case, you have to fight air resistance to move forward and in the absence of any other external energy supply, you will have to slow down. I'm with DrewDad on this one... I can't see it.