| A | B |
|---|
| speed | rate of change of position (how fast) |
| velocity | speed and direction of object |
| momentum | product of mass & velocity |
| relative motion | object changes position relative to reference point |
| displacement | distance & direction of object's position from starting point |
| constant speed | speed does not change over time |
| instantaneous speed | speed at any given point of time |
| average speed | calculated speed when object is changing speed |
| distance - graph | y axis, dependent, vertical |
| time - graph | x axis, independent, horizontal |
| accelerate | rate of change of velocity |
| centripetal acceleration | acceleration toward center of curved path |
| speed increases | acceleration & velocity same direction |
| speed decreases | opposite direction - speed & acceleration |
| SI unit of acceleration | m/s2 |
