A driver travels at 130 km/h on a dry road. Using the Swiss rules of thumb for reaction distance (speed ÷ 10 × 3) and braking distance ((speed ÷ 10)²), what is the total stopping distance?
Answer and explanation
Correct answer: B. 208 m
- Step 1: Reaction distance = 39 m and braking distance = 169 m. Step 2. Stopping distance = 208 m. Answer: 208 m. Why not the others: 169 m results from having counted the braking distance only. 39 m results from having counted the reaction distance only. 247 m results from having counted the reaction distance twice.
Practise more Geschwindigkeit, Abstand und Überholen.
Free questions with an explanation for every one, and full timed Driving Theory Test (Car) - Switzerland mock tests.
More Geschwindigkeit, Abstand und Überholen questions
- A driver increases speed from 60 km/h to 120 km/h. By what factor does the braking distance change?
- How many minutes does a car need for 10 km at a constant 50 km/h?
- Using the Swiss rule of thumb (reaction distance in metres = speed in km/h ÷ 10 × 3), how far does a car travelling at 90 km/h move during t…
- Using the Swiss rule of thumb (braking distance in metres = (speed in km/h ÷ 10)², dry road), what is the braking distance at 100 km/h?
- What is the general speed limit on a semi-motorway (Autostrasse)?
- A driver travelling at 126 km/h needs 2 s to react to a hazard. How far does the car travel before the driver starts to brake?