| A | B |
|---|
| speed | a measure of how far an object moves in a given time; measured in m/s or km/h |
| average speed | distance traveled divided by the time taken to travel that distance |
| speedometer | device used in vehicles to show the speed of the vehicle at that moment |
| distance-time graph | graph that shows distance on the y-axis and time on the x-axis |
| speed-time graph | a graph that shows speed on the y-axis and time on the x-axis |
| accelerate | change velocity, e.g. speed up |
| decelerate | to slow down or reduce speed |
| velocity | the speed at which something is moving in a specific direction |
| instantaneous speed | speed of an object at a specific point in time; a.k.a. speed at point |
| *vector | a variable quantity, such as force, that has magnitude and direction |
| *accuracy | being close to the true value |
