# The car at the time of the start of braking had a speed of 54 km / h. Find the braking distance

December 29, 2020 | education

| **The car at the time of the start of braking had a speed of 54 km / h. Find the braking distance and braking acceleration if braking lasted 15 s**

Let us assume that the body braked along the entire path with constant acceleration, then the body’s motion is equally slow, then:

a = V / t

Let’s translate V in m / s:

54000/3600 = 15m / s

a = 15/15 = 1m / s ^ 2

S = V ^ 2 / 2a = 54 * 54/2 = 1458m

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