Question

How long does it take a ball to fall 75.0m? (g = -9.81 m/s²)

O 15.3 m/s²
O 3.91 s
O 15.3 s
O 3.90 m/s²

Answer 1

3.91 s

Step-by-step explanation:

d = -75

a = -9.81

d = 1/2 at^2

-75 = 1/2 ( -9.81) (t^2)

75 = 1/2 ( 9.81) t^2 shows t = 3.91 s