What is the initial velocity of a car after its brakes are applied?

[lockmantican]

A car is initially traveling at 50.0 km/h. The brakes are applied and the car stops over a distance of
35 m. What was magnitude of the car's acceleration while it was braking?
for this problem i know you have to use V= (Vf^2 - Vo^2)/2a
how do you figure out the initial velocity after the breaks are applied?

 

[lewando]

for this problem i know you have to use V= (Vf^2 - Vo^2)/2a

You mean to say: x - x₀ = (V_f² - V₀²)/2a

how do you figure out the initial velocity after the breaks are applied?

It is given: 50km/h