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BDifficulty 2/5

At the same travel speed, if alcohol lengthens reaction time, what happens to reaction distance?

Correct answer

It increases because the response starts later.

It increases. Reaction distance is the distance travelled from perceiving danger until starting a response, and depends on speed and reaction time. At the same speed, taking longer to react means travelling farther before acting. It differs from braking distance, which begins when braking is applied. Alcohol can impair attention and response; do not drink if you will drive.

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  • It does not change: it depends only on the vehicle’s mechanical condition.

  • It increases because the response starts later.

  • It decreases even at the same speed.

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