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Speed and following distanceQuestion 215 of 318

You double your speed. What happens to the energy of your vehicle?

  1. It becomes two times larger
  2. It becomes three times larger
  3. It becomes four times larger
  4. It stays the same
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Correct answer: It becomes four times larger

If you double your speed, the energy becomes four times larger. At triple speed, it is nine times larger. The vehicle then needs a longer distance to stop.

Source: Driving a Passenger Vehicle (SAAQ, 2022), Chapter 3, Controlling the Vehicle > Laws of physics > Kinetic Energy, page 77

Practice speed and following distance

Questions last reviewed: 18 October 2026