A car travels at 90 km/h. The driver's reaction time is 1 s and the car then decelerates at 5 m/s^2. What is the total stopping distance?
Answer and explanation
Correct answer: C. 87.5 m
- Step 1: Reaction distance = 25 x 1 = 25 m.
- Step 2: Braking distance = 625 / 10 = 62.5 m, so the total is 87.5 m.
Answer
87.5 m.
Why not the others: 62.5 m is only the braking distance and 25 m only the reaction distance; the stopping distance is their sum.
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