Rules of the Road
What happens to your braking distance if you double your speed?
South African learner's licence practice question. Difficulty: hard.
Answer: Braking distance increases roughly with the square of speed, so doubling your speed multiplies braking distance by about four.
- A. It stays the same
- B. It doubles
- C. It roughly quadruples - correct
- D. It halves
Explanation
Braking distance increases roughly with the square of speed, so doubling your speed multiplies braking distance by about four.
More Rules of the Road questions
- What is the general speed limit in an urban area in South Africa?
- What is the general speed limit on a rural public road outside an urban area?
- What is the maximum speed limit on a South African freeway, unless otherwise indicated?
- What must you do when approaching a stop sign?
- What does a Yield (Give Way) sign require?
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