Stopping Distances Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. What is stopping distance made up of?
- A. Thinking distance only
- B. Braking distance only
- C. Thinking distance + braking distance
- D. Reaction time × speed
2. Which factor mainly affects thinking distance rather than braking distance?
- A. Worn tyres
- B. Wet road surface
- C. Driver tiredness
- D. Worn brake pads
3. A driver doubles their speed. What roughly happens to braking distance?
- A. It stays the same
- B. It doubles
- C. It quadruples
- D. It halves
4. Why does alcohol increase stopping distance?
- A. It reduces vehicle mass
- B. It increases reaction time, increasing thinking distance
- C. It increases tyre grip
- D. It has no effect on stopping distance
5. A car's kinetic energy must be removed by work done by the brakes to stop it. Which relationship best explains why braking distance rises steeply with speed?
- A. Work done = force × distance, and KE is proportional to v², so distance is proportional to v²
- B. Work done is independent of speed
- C. Braking force always increases with speed
- D. KE is proportional to v, not v²