Question

How long does it take for a dropped rock to fall from a height of 8 meters

Answer 1

1.28 s

Step-by-step explanation:

Given:

Δy = 8 m

v₀ = 0 m/s

a = 9.8 m/s²

Find: t

Δy = v₀ t + ½ at²

(8 m) = (0 m/s) t + ½ (9.8 m/s²) t²

t = 1.28 s