How fast should you drive the car so that, switching to movement with an acceleration of 1.5 m / s, you can cover the distance of 195 m in 10 s?
Initial data: a (acceleration, which the car moved to) = 1.5 m / s2; S (distance traveled) = 195 m; t (duration of vehicle movement) = 10 s.
The speed with which it was necessary to drive the car before acceleration is determined from the formula: S = V0 * t + 0.5 * a * t ^ 2, whence V0 = (S – 0.5 * a * t ^ 2) / t.
Let’s calculate: V0 = (195 – 0.5 * 1.5 * 10 ^ 2) / 10 = 12 m / s.
Answer: The car had to be driven at a speed of 12 m / s.
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