Answer:
1.74901 seconds
Step-by-step explanation:
The formula for free fall from height x is:
x (m) = 1/2 • g (m/s^2) • t^2 (s^2)
The time t (s) for free fall from height x (m) is:
t (s) = √[2 • x (m) / g (m/s^2)]
So when height x = 15 m,
t (s) = √[2 • 15 (m) / 9.807 (m/s^2)] = 1.74901
