Windmills and airplanes use air pressure to rotate and fly by using what is called Bernoulli's principle. This is when the difference of air pressure forces lift on airplanes and the turbines to turn.
2. Why was it nessecary to twist the rotor blades at an angle?
It was nessicary to twist the rotor blades at an angle so the blades could catch the wind and spin more easily, providing more energy.
3. Explain how the rotors of a windmill and the sail of a sail boat illustrate the same principle.
The rotors of a windmill and the sail of a sail boat both illustrate Bernoulli's Principle.They both illustrate this because the curve of the blade or sail increases the speed of the wind at the point of the curve. This causes the air pressure to change on one side. With different air pressures on each side of the blade or sail, they will move.
4. Which rotor had the most power? Why?
Kirsten and Madison's. Their windmill had the most power because thier blades were long and skinny-- the ideal design for windmills. Also, the blades were at an angle-- which helped catch the wind. Finally, their turbine was light enough to turn easily, not not so flimsy that it broke.
5. The maximum power in the classroom varied. What was different about the design that produced the most power?
Kirsten and Madison's design was different because as I just mentioned, their blades were long and skinny. Lots of other designs, including mine, were more short and thick. The blades were at an angle and the weight of the windmill was just right!
Kirsten and Madison's design was different because as I just mentioned, their blades were long and skinny. Lots of other designs, including mine, were more short and thick. The blades were at an angle and the weight of the windmill was just right!
6. What are limitations of the models?
The limitations of my model were that it was rather flimsy. If the wind had gotten super powerful, there is a good chance that my model would break. Also, my models was very short and thick. If I were to do this again, I would build a windturbine more sturdy as well as longer and thicker.
Length of string: 85 cm
Total washers lifted: 7
Mass of washers: 50.02 g
Seconds needed to lift string: 41
Amount of energy produced: 12.4 W
The limitations of my model were that it was rather flimsy. If the wind had gotten super powerful, there is a good chance that my model would break. Also, my models was very short and thick. If I were to do this again, I would build a windturbine more sturdy as well as longer and thicker.
Length of string: 85 cm
Total washers lifted: 7
Mass of washers: 50.02 g
Seconds needed to lift string: 41
Amount of energy produced: 12.4 W
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