| A | B |
|---|
| motion | a change in position of an object when compared to a reference point |
| speed | how fast an object moves from one place to another in a specific amount of time |
| average speed | the total distance traveled divided by the total time |
| velocity | the speed and direction of a moving object |
| at rest | a horizontal line on a distance-time graph |
| vector addition | used when an object has more than one direction, more than one speed and more than one velocity |
| acceleration | can change when the speed increases, speed decreases or a change in direction |
| instantaneous speed | a speedometer shows this |
| frame of reference | a system of objects that are not moving with respect to each other |
| displacement | the direction and distance from a starting point to an ending point |
| distance | the length of a path between two points |
| vector | a quantity that has magnitude and direction |
| relative motion | movement in relation to a frame of reference |
| kilometer | the SI unit of distance approriate for measure the distance between 2 cities |
| negative | if a car's final velocity is zero and its intial velocity was 10 m/s, it has this type of acceleration |
| slope | this on a speed-time graph shows acceleration |
| free fall | describes the condition of objects falling and accelerating at -9.8 m/s2 |
| vi | initial velocity |
| vf | final velocity |
| a | acceleration |
| d | distance |
| t | time |
| m/s | velocity |
| m/s2 | accelertion |
| downward | the acceleration due to gravity is this direction |
| no acceleration | a horizontal line on a speed-time graph |
| curved line | on a distance-time graph shows acceleration |
| POO | point of origin |
