A utility vehicle travels on the same road at two different speeds. The driver’s reaction time is 0.70 s in both cases. The braking distances are shown in the table.
| Speed (m/s\text{m/s}m/s) | Braking distance (m\text{m}m) |
|---|---|
| 12 | 12 |
| 24 | 48 |
Calculate the stopping distance when the utility vehicle is travelling at 12 m/s.
Calculate the ratio of the stopping distance at 24 m/s to the stopping distance at 12 m/s.
Explain why the stopping distance at 24 m/s is not four times the stopping distance at 12 m/s.