So I have a car in a 2d game that runs on acceleration and speed, two values that have a max. The acceleration is small, under the value of 1 and it rises by an incrementation. The speed is large number like 100 and it rises by incrementing the current acceleration. They are both incremented relative to the fps but that's not important.
What I am trying is to have a formula with having only one value (with a max) instead of two as I am trying to simplify the UI for the player.
Alternatively, I was thining of having a value (lets call it speed) that gets incremented by something, without a max, but is limited by, lets say road friction (like multipling it with 0.99). Such a thing would be felt lower when the car is slow but eventually the friction would act as a max/limit, the car oscilating to near max values.
I know too little of physics and car stuff to figure this out on my own so I am reaching out for help. Thanks!