Question

Решите задачу.......

Answer 1

h=at^2/2=1.25*64/2=40м

gt^2/2=h;

5t^2=40;

t^2=8;

t=2.82

Answer 2

h = at^2 2
h = 1,25 * 64 2 = 40 (м)
h = gt^2 2 => t = √(2h g )
t = √(2 * 40 10) ≈ 2,8 (c)