The car braked for 5 s, while the speed of the car decreased from 30 to 10 m / s. What distance did the car drive during the braking time?
| December 18, 2020 | education
Vк = V0 ± a * t
10 = 30-5a
5a = 30-10
5a = 20
a = 4 m / s ^ 2
Next, we use the formula
S = (Vk ^ 2-V0 ^ 2) / 2a
S = (30 ^ 2-10 ^ 2) / 2 * 4 = (900-100) / 8 = 800/8 = 100 m
Answer: 100 m
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