During ovarian braking, the vehicle moving at a speed of 54 km / h stopped after 5 seconds to find the braking distance.

Given:

V0 = 54 km / h = 15 m / s – vehicle speed at the beginning of braking;

t = 5 s – time from the beginning of braking to stopping.

It is required to find S – the braking distance of the car.

First, let’s find the acceleration with which the car was braking:

a = V0 / t = 15/5 = 3 m / s ^ 2.

Now let’s find the braking distance:

S = V0 * t – a * t ^ 2/2 = 15 * 5 – 3 * 5 * 5/2 = 75 – 37.5 = 37.5 meters.

Answer: the braking distance of the car is 37.5 meters.