A braking force of 16 kN acts on a car weighing 2 tons, what is the initial speed of the car if the braking distance is 50 m?

To solve this problem, we use Newton’s second law:
a = F / m = 16000/2000 = 8m / s ^ 2
S = V ^ 2 / 2a
V = sqrt (S * 2a) = sqrt (50 * 16) = 9m / s approximately

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