| A | B |
|---|
| addition of vectors | Two or more vectors can be added together to determine the result (or resultant). More details here: |
| air speed | the speed of an aircraft relative to the air (kn) |
| altitude | flying height of a plane above sea level |
| coordinates | a set of numbers that defines the location of a point in space |
| current speed | speed at the moment of observation |
| distance | the separation between two points |
| displacement | the shortest distance from the initial to the final position of something (m) |
| force | agent that results in accelerating or deforming an object (N) |
| frame of reference | coordinate system used to define motion |
| ground speed | the resultant vector speed combining air speed and wind speed |
| knots | (pronounced not) is a unit of speed equal to one nautical mile (1.852 km) per hour |
| mean (or average) speed | The average of two speed. final speed + initial speed divided by 2. v = Vf + Vi/2 |
| position | separation between an object and its reference point |
| Pythagoras‘ Theorem | It states that the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides. a²=b²+c² |
| reference point | zero location in a coordinate system |
| resultant | a vector representing the sum of two or more vectors |
| scalar | quantity |
| speed | ratio of distance travelled to time interval. v=?d/?t (=change in distance divided by change in time) |
| vector | quantity having both magnitude and direction |
| velocity | ratio of change of position to time interval over which change takes place |
| wind barbs | graphical representations of both the direction and speed of wind |
