1. Which rotor had the most power and why?
The rotor that worked the best for us was our one made out of milk jugs. It worked well because it was a hard plastic and had the curves so that the wind hit it just right to get it to move. Our other one didn't have the bend and didn't move as well.
2.What was different about the design with the most out put?
I noticed that the designs that worked the best were long and slender compared to our design. I think that that probably helped it catch the wind better.
3.What are the limitations of the model?
Looking at the other models I would say that a limitation of ours is that it was not as long and skinny as the ones that worked well.
4.How do airplanes and windmill use air pressure to rotate.
If you look closely the wings on a plane and on a windmill have a slight curve in the wing. This helps so that when the air pressure hits it the wind will flow right over the wing causing it to spin/lift the wing.
5.Why was it necessary to twist the blades?
By twisting the blades all the same direction the air pressure will hit them just right making the air go over the blade which causes it to spin.
6.How do rotors of a windmill and the sail of a sailboat illustrate the same principles?
They illustrate the same principle because they both have slight curves in the sail/wing that cause the air pressure to hit it and go over it causing it to move.
Mass Height Energy Power Time
7.83g .7874m 60.54J 1.06w 20s
14.7g .889m 128.85J 7.336w 30s
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