Nothing in what you have said means that acceleration cannot be constant.
If you, or some automatic means, were to carefully adjust the accelerator
so that the speed increased by 10 kph each second for 10 seconds the acceleration would be constant for those 10 seconds.
Where is the problem it that?
The problem is in the word,
ACCELERATION, because it means the movement of the vehicle/object builds in mph or m/s or inches per second if you want.
It means that it can never be constant even if you accelerate for 1 second or 100 seconds, etc.
It doesn't matter which way you look at it in any realistic term. Acceleration will never be a constant....ever.
What you are claiming is that you could never work thebeforehandut before hand.
Hence you would be totally useless at designing anything in the real world where you continually have to work out
"what would happen if . . . . . ?" type of problems.
Thanks for proving how really useless your ideas would be at handling real world problems,
No. I could work stuff out in hypothetical situations.
For instance if someone says, what would happen if you could stop a truck with one hand whilst wearing a pair of tight leggings showing the extremely tiny little bulge in your pants, whilst wearing a cape with your hair also slicked back.
I'd probably say that the truck would be smashed up and I'd think I was superman.
All totally hypothetical of course.