Estimating stopping distance

Average stopping distances for cars at varying speeds are given in the UK Highway Code:
- A car travelling at 20 mph will have a thinking distance of around 6 m and a braking distance of around 6 m.
- A car travelling at 70 mph will have a thinking distance of around 21 m and a braking distance of around 75 m.
The relationship between speed and stopping distance can be inferred from graphed data.

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