| A | B |
|---|
| UAV | unmanned aerial vehicle |
| balanced forces | when all forces are equal and object doesn't accelerate in any direction |
| unbalanced forces | when forces are unequal and object has acceleration |
| gravity | the force pulling an object towards Earth |
| lift | the force pushing an object up into the air |
| thrust | the force pushing an object forward |
| drag | the force acting against an object when it is moving forward, usually due to air resistance |
| vertical movements | include climbing, hovering, and descending |
| rotational movements | include turning |
| horizontal movements | include moving left, right, forward and backward |
| pitch | movement of the UAV forward or backward, controlled by right thumb in app |
| throttle | movement of the UAV up and down, controlled by left thumb in the app |
| roll | movement of the UAV left and right, controlled by right thumb in the app |
| yaw | rotation of the UAV left or right, controlled by left thumb in the app |
| axi | one plane of several that the drone might move through |
| BVLOS | beyond visual line of sight |
| FPV | first-person view |
| no-fly zone | an area where drone flying is not allowed |
| payload | an object or additional mass that a drone carries in addition to its own mass, including batteries |
| prop guard | the cage surrounding the props; protects them from damage or entanglement and protects users |
| quadcopter | an aerial drone with four propellers |
| R/C | remote controlled |
| trim | an adjustment to how a drone hovers |
| VLOS | visual line of sight |
| VO | visual observer |
| waypoint | a point in space defined by coordinates in three-space |
