Adjusting Velocity Of Object So I'm making a small game on Blender Game Engine and its racing. What i want is so that when a player presses w the car starts moving and slowly gains velocity. I know about the controller's that make an object move but i want to know how to make it BUILD speed as it progresses.(the reason i tagged this as python is because i am assuming this will take some python. Do i use Python for this)?
Actually, it doesn't require python. It requires the ... servo motion actuator:

Use the LinearVelocity to set the maximum speed, and the force limits to set the maximum acceleration.

For anything more complex than this, yes, you will need python.