Answer:
9.49 s
Explanation:
Applying,
s = ut+gt²/2................ Equation 1
Where s = heigth of the deck, u = initial velocity, t = time, g = acceleration due to gravity.
From the question,
Given: s = 450 m, u = 0 m/s( dropped from height)
Constant: g = 10 m/s²
Substitute these values into equation 1
450 = (0×t)+10t²/2
450 = t²
5t² = 450
t² = 90
t = √90
t = 9.49 s
