| Forces Acting On a Plane |
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| \/ Gravity |
| Lift ^ |
| > Thrust |
| Drag < |
| Thrust- A forward force made in an airplane by an engine. Gravity- A pulling force that draws objects toward the earth. Drag- A slowing force caused by resistance of air on an airplane. Lift- The upward force caused by different air pressures on an airfoile (wing). |