You can't determine the velocity of a car with constant acceleration just from that information alone. Here's why:

* Constant acceleration means the velocity is *changing*: Constant acceleration implies the car's speed is increasing or decreasing at a steady rate.

* We need more information: To find the velocity, you'd need to know:

* Initial velocity (v_i): The car's starting speed.

* Acceleration (a): The rate at which the car's velocity changes.

* Time (t): How long the car has been accelerating.

Here's how to calculate the final velocity (v_f) using these values:

* Equation: v_f = v_i + at

Example:

* A car starts from rest (v_i = 0 m/s)

* It accelerates at 2 m/s² (a = 2 m/s²)

* For 5 seconds (t = 5 s)

Calculation: v_f = 0 + (2 m/s²)(5 s) = 10 m/s

Therefore, after 5 seconds, the car's velocity would be 10 m/s.