When Maggie applies the brakes of her car, the car slows uniformly from 15.3 m/s to 0 m/s in 2.23 s. How far ahead of a stop sign must she apply her brakes in order to stop at the sign? Answer in units of m

The answer is 34.119m

Explanation:

You need to pay attention to the word "uniformly". It means there is no acceleration thus the physics of this problem respond to the uniform rectilinear motion equations:

Xf = Xo + vt v = constant a = 0

where:

Xf = Final position Xo = Origin position v = velocity (speed) t = time a = acceleration

Xf = 0 + (15.3) (2.23)

Xf = 34.119m