Question

is it possible let that the breaks of a car are so perfect that car stops instantaneously

Answer 1

No, it is not possible. In order to make velocity zero in an infinitesimally small interval of time, the car needs an infinite deceleration which is not possible.

Answer 2

i think it depends,as if the car is at a relatively lower speed it will stop,but if it is in a higher speed,its inertia will push it forward