| A | B |
|---|
| airfoil | a shape like that of airplane wings |
| bernoulli's principle | if a fluid is moving along a surface it causes a force to be exerted at a right angle to the surface; a faster-flowing liquid causes lessforce than a slower moving liquid |
| gravity | keeps a plane on the ground or pulls a plane when thrust; the force that moves a plane forward |
| drag | the force that opposes thrust; also known as resistance |
| lift | a plane will never leave the ground unless this force is created under its wings |
| pitch | the upward or downward motion of the nose of a plane |
| roll | the motion that occurs when one wing dips lower than the other |
| elevator | helps control the pich of the glider |
| ailerons | a plane rolls or banks to the left when left ailerons are up and right aileron is down |
| rudders | cause the nose ot the plane to turn right or left |
