How does windmills fit into physics?

Answer 1

Long ago, windmills were used to pump water from lowland locked areas, Holland. It was below sea level and flooded, they used wind to turn a big propeller - the windmill, a windfarm, and through a serturns with ies of gears, turned shafts and 'lifted' the water fom lower areas out to water chutes to the sea.

Nowadays, people are looking for ways to make energy without gasloline, oil, or coal, or even wood. The harness the wind. It was done long ago when there were no power plants, we are going back! The modern Wind Turbine is huge, up to 10 stories high, and the propellers, the windmill shafts, are aluminum and computer designed to get the most out of turning when the wind blows. Most are place in windy areas, have ultra balanced shafts the propellers turn on, so the least wind will turn them. Once turning, a generator will turn with them and tht generates power, just like water over Hoover Dam generates power, it turns a turine as well. The better the turning ability of the blade (propeller, windmill), the faster and more power they can get from the least wind.

Physics comes in when they design that - lightest, best angles for the blade, strongest to not bend when turning, cheapest, lngest lasting. All the elements for the best engine ever you can imagine.

DMS, doveshawk.