Question

a formula used for calculating velocity is v=1/2at^2

Answer 1

??

Answer 2

wasn't it vx = v0x + ax*t, well that's the integral of a(t) = c; so it'd only apply when constant acceleration is assumed, anyways what's your question exactly? verifying if the formula you typed is true or not, perhaps?

Answer 3

well your formula isn't false, it suggests that a(t) = t, though.