A driver travelling at 90 km/h reacts to a hazard after 2 seconds. How far does the car travel during this reaction time?
Answer and explanation
Correct answer: A. 50 m
- Step 1: 90 km/h is 90 / 3.6 = 25 m/s.
- Step 2: Reaction distance = 25 x 2 = 50 m.
Answer
50 m.
Why not the others: 180 m multiplies km/h by seconds without converting units; 25 m is only the distance covered in one second; 100 m is double the correct value.
Practise more Speed, distance and stopping.
Free questions with an explanation for every one, and full timed Vozacki ispit (Driving Theory Test) - Montenegro mock tests.
More Speed, distance and stopping questions
- A car travelling at 54 km/h brakes with a constant deceleration of 4 m/s^2. What is the braking distance?
- A car travels at 90 km/h. The driver's reaction time is 1.5 s and the car then decelerates at 5 m/s^2. What is the total stopping distance?
- A driver increases speed from 60 km/h to 180 km/h on the same road surface. By what factor does the braking distance increase?
- A driver looks at a phone for 2 seconds while driving at 72 km/h. How far does the car travel in that time?
- How many minutes does a car need to cover 60 km at a constant 120 km/h?
- A car stops from 36 km/h in 6 seconds with constant deceleration. What is the deceleration?