You need to learn to read. See post 31.You need to learn to read. I never suggested the need for an additional power source for the car between the conveyors.You haven't retracted your claim that the land yacht needs a battery to go faster than the wind.
When the size of the pulleys are equal, we get back to my previous picture. Tip speed of bottom wheels are 1 m/s. The car would be stationary wrt observer, or 1 m/s relative to bottom conveyor.If it's moving at 0 m/sec relative to the top conveyor, the wheel would not be turning at all, which contradicts a 2:1 ratio between the turn rates of the two wheels. Your algebra is off.
With 2:1 ratio, the car would move 2 m/s relative to bottom conveyor, or 0 m/s relative to top conveyor.
With 3:1 ratio, the car would move 3 m/s relative to bottom conveyor, or 1 m/s relative to top conveyor.It will not. It will move at 1.5 m/sec right relative to the bottom conveyor and 0.5 left relative to the bottom. Only then is the ratio 3:1 with the wheels turning in the same direction as you have it pictured. If you figure-8 the belt, the wheels will turn with a ratio of 3:1, but in the opposite direction, which gets the car going at 3 m/s as you indicate. The 2:1 ratio makes it go even faster.
When the ratio is negative, like in 8 figure V-belt, the car would move backward.Your assertion contradicts the algebra. If you want the assembly to move left, the lower pulley needs to be the larger one, regardless of regular or figure-8 looping of the belt.
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