How does doubling the travel speed affect the braking distance of a passenger vehicle?
Answer and explanation
Correct answer: D. The braking distance quadruples to four times original
- Step 1: Physical formula for kinetic energy and braking: . Step 2. Because speed is squared, doubling speed () results in times the braking distance. Answer: The braking distance quadruples (increases four times). Why not the others: Doubling speed does not double braking; tripling is for speed; braking distance always increases with speed.
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