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BDifficulty 2/5

If speed increases while reaction time remains unchanged, what happens to the distance travelled before braking begins?

Correct answer

It increases.

It increases: reaction distance equals speed multiplied by reaction time. This does not mean speed alone determines how long the driver takes to react. Total stopping distance includes both reaction distance and braking distance.

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All options

  • It remains unchanged regardless of speed.

  • It increases.

  • It decreases.

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