What distance the car traveled to a stop, if its initial speed is 36 km / h, and the braking time is 4 s.
| August 17, 2021 | education
Task data: V0 (initial speed) = 36 km / h (in Cu t = 10 m / s); t (vehicle braking time) = 4 s.
Since the car was moving to a complete stop, then a (acceleration) <0 and V (final speed) = 0, and the formula for the distance traveled will take the form: S = -V0 ^ 2 / (2 * (-a)) = V0 ^ 2 / (2 * (V0 / t)) = V0 * t / 2.
Calculation: S = 10 * 4/2 = 20 m.
Answer: The car will have time to go 20 meters before the stop.
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