Question

derive velocity time relating v=u=at

Answer 1

by definition of acceleration,
we get,
$a = \frac{v - u}{t} \\ at = v - u \\ at + u = v$
•°• v=u+at

proved----

Answer 2

Hii..

Dimension of , v=m/s =LT^-1

Dimension of, u=m/s = LT^-1

And, Dimension of , at = m/s^2 × s = m/s = LT^-1

hence, the dimensions are same we can say

v = u = at

__________

hope this helps !