A car travels at 108 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: D. 120 m
- Step 1: Reaction distance = 30 x 1 = 30 m.
- Step 2: Braking distance = 900 / 10 = 90 m, so the total is 120 m.
Answer
120 m.
Why not the others: 90 m is only the braking distance and 30 m only the reaction distance; the stopping distance is their sum.
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