Assume an object begins from rest, accelerates 2m every second and ran for about 4 seconds.
I see that as
In 1st second covered: 2m
In 2nd second covered: 4m
In 3rd second covered: 6m
In 4th second covered: 8m
That gives total distance covered as 20m
Now, if I go by formula s = ut + 1/2(at^2)
I get, s = (0)4 + 1/2(2*4^2) = 1/2(32) = 16m
That's doesn't match.
What I am missing here?