Wind Energy

4. a force that resists the relative motion of two bodies in contract.
6. the friction of the blades against air molecules as they rotate
8. An electronic instrument that can measure voltage, current and resistance
10. Central component connecting the blades to the driveshaft
11. a force encountered by the blades that is perpendicular to the oncoming flow of air. Lift is a force working to speed up the rotation of the blades
12. the rate at which energy changes form from one form to another, or the rate at which work is done.
13. the area directly in line with the rotor. This is a dangerous area to stand in case a blade flies out while spinning.
15. a measure of the rate of flow of electrical charge

1. the rotating section comprised of blades projecting from a hub.
2. the conversion of energy from one for to another.
3. the rod or shaft connected to the hub; it rotates the rotor.
5. “tear drop” shape cross-section used for wind turbine blades.
7. the electrical pressure or potential difference that drives the electric current. 1 volt = 1 amps x 1 ohm = 1 watts/ 1 amps
9. a force times a distance that causes rotation. The more surface area the blade has, the more torque the wind applies to the blade
13. The angle of the blades with respect to the plane of rotation.
14. the metric unit of power.