The braking distance of the car is 7.2 m. With what acceleration did the car move if its initial speed was 8 m / s?
| March 31, 2021 | education
To find the acceleration with which this car should have moved, we use the formula: S = Vn ^ 2 / 2a, from where we express: a = Vn ^ 2 / 2S.
Variables: Vн – initial speed (Vн = 8 m / s); S – braking distance (S = 7.2 m).
Calculation: a = Vn ^ 2 / 2S = 8 ^ 2 / (2 * 7.2) = 4.44 (4) m / s2.
Answer: The vehicle was decelerated with an acceleration of 4.44 (4) m / s2.
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