S = Vot - gt^2 / 2
t2 = t + 2
30t - gt^2 / 2 = 30 * (t + 2) - g * (t + 2)^2 / 2
30t - 4,9t^2 = 30t + 60 - 4,9t^2 - 19,6t - 19,6
t = 2,06
h = 30t - gt^2 / 2 = 41 м.
S = Vot - gt^2 / 2
t2 = t + 2
30t - gt^2 / 2 = 30 * (t + 2) - g * (t + 2)^2 / 2
30t - 4,9t^2 = 30t + 60 - 4,9t^2 - 19,6t - 19,6
t = 2,06
h = 30t - gt^2 / 2 = 41 м.