The answer is 1.6 s
The kinetic formula that can be used is:
d = v1 t + 1/2 a t²
d - distance
v1 - initial velocity
t - time
a - gravitational acceleration
We have:
d = 12.5 m
v1 = 0 (in free fall)
t = ?
a = 9.8 m/s²
d = v1 t + 1/2 a t²
12.5 = 0 t + 1/2 9.8 t²
12.5 = 0 + 4.9 t²
12.5 = 4.9 * t²
t² = 12.5/4.9
t² = 2.55
t = √2.55
t = 1.6 s
