A car travels at 90 km/h. The driver's reaction time is 1.5 s and the car then decelerates at 8 m/s^2. What is the total stopping distance?
Answer and explanation
Correct answer: D. 76.6 m
- Step 1: Reaction distance = 25 x 1.5 = 37.5 m.
- Step 2: Braking distance = 625 / 16 = 39.1 m, so the total is 76.6 m.
Answer
76.6 m.
Why not the others: 39.1 m is only the braking distance and 37.5 m only the reaction distance; the stopping distance is their sum.
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