# 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?

December 29, 2020 | education

| 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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