The travel speed is the main element that influences the braking distance of the motor vehicle. The tyre tread and the efficiency of the steering system are factors that can influence other aspects of driving, but they are not main determinants for the braking distance.
The correct answer is: A
STOPPING DISTANCES DEPENDING ON THE TRAVEL SPEED
| Travel speed in km/h | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | 110 | 120 | 130 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel speed in m/s | 2.7 | 5.5 | 8.3 | 11.1 | 13.8 | 16.6 | 19.4 | 22.22 | 25 | 27.8 | 30.55 | 33.33 | 36.11 |
| Distance travelled during reaction time (m) | 2.77 | 5.55 | 8.32 | 11.11 | 13.88 | 16.65 | 19.4 | 22.22 | 25 | 27.8 | 30.55 | 33.33 | 36.11 |
| Distance travelled during the mechanical braking time (m) | 1.50 | 3 | 7 | 12 | 19 | 27 | 37 | 48 | 61 | 78 | 90 | 108 | 130 |
| Total stopping distance (m) | 4.27 | 8.55 | 15.32 | 23.11 | 32.88 | 43.65 | 56.4 | 70.22 | 86 | 105.8 | 120.55 | 141.33 | 166.11 |
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