The formulas to do with acceleration are...
| ACCELERATION = | NEW SPEED - OLD SPEED |
| TIME taken to change speed |
If you want to know how fast a runner will be travelling after accelerating for a certain time...
| NEW SPEED = | (ACCELERATION x TIME) + OLD SPEED |
If you want to know how far a runner will go in a certain time when accelerating from standing start...
| DISTANCE = | 0.5 x | ACCELERATION x | TIME x TIME |
When a runner is accelerating their speed is changing, to find 'average' speed use...
| AVERAGE SPEED = | 0.5 x | (OLD SPEED + | NEW SPEED) |