Answer:
1.0 sec
Step-by-step explanation:
Assuming the stone starts at rest (V₀ = 0) and drops in free fall straight down vertically:
Δx = V₀t + 1/2at²
4.9 m = 0 + 1/2(9.8 m/s²)t²
t² = 2(4.9 m) / (9.8 m/s²)
t² = 1 s²
t = √1 s² = 1 s
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