| A | B |
|---|
| gravity | force of attraction between two masses |
| lift | an upward force thta acts against the force of gravity |
| airfoil | a surface shaped to produce a lift when air mves over and around it. |
| drag | the resistance to motion caused by friction |
| air resistence | the friction caused by an object moving past air molecules. |
| streamlined | having a shape that offers low air resistance. |
| turbulence | an area of irregular motion in a flowing fluid. |
| thrust | a force that moves an object forward |
| manufacture | to make something into a finished product |
| propeller | a device with a vevolving hub and radiating blades that attaches to the engine to propel an airplane |
| constraint | a limitation or restriction |
| fluid | a substance that flows and takes the shape of the container that it is in |
| elevator | a hinged flat section on an airplane's tail that can be adjusted to make the airplane go up or down |
| flap | the moveable portion of an airplane's wing that helps the airplane slow down when landing or gives it more lift on takeoff |
| aileron | the movable portion of an airplane's wing that helps control the airplane's rolling, side-to-side motion |
