Wind Turbine

Medium Speed- 6 washers

39.37grams x 9.82 x 1.05 meters = 398.21 j.
398.21/16.6sec = 23.99w

Airplanes and windmills fly and rotate from the wind pushing against the blades of the turbine.
It was necessary to turn the blades at an angle because otherwise the wind has to have a way to get under it and push it which makes it spin. The rotors on a windmill and the sail of a sailboat illustrate the same principle, because they both use wind to move. The sailboat sail is loose so when the wind blows on the sail it goes forward. When the wind blows on the rotors it makes it turn. Our rotor that was made of Card stock paper produced the most energy. Our other one was made of Aluminum foil. The reason why the card stock worked better is because it was bigger, stronger, and curved more. All these properties helped catch the wind more, therefore it spun better. The difference between mine and the one that made the most energy is the design. Mine was big but it was wide. Thiers was long and thin.