H = (V^2-Vo^2)/2g
V^2-Vo^2 = 2gH
V^2 = 2gH +Vo^2 = 2*10*15 +8.5^2 =372.25
V =√372.25 =19.29 =19.3 м/с
H = (V^2-Vo^2)/2g
V^2-Vo^2 = 2gH
V^2 = 2gH +Vo^2 = 2*10*15 +8.5^2 =372.25
V =√372.25 =19.29 =19.3 м/с