When the air resistance can be ignored the velocity of an object dropped initially from rest is given by following equation where g is free fall acceleration g*t^2/2
g*t
g*t/2
g

v = gt

Explanation:

From the question given, we obtained the following information:

Initial velocity (u) = 0 m/s

Acceleration due to gravity (g) = g

Time (t) = t

Final velocity (v) =.?

Thus, we can obtain the velocity as illustrated below:

v = u + gt

v = 0 + gt

v = gt

Thus, the equation for the velocity is

v = gt