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consideramos que g, no varia.
g = 9.81 m/
Como dejamos caer la piedra: vo= 0 m/s
vo + vf
h = ----------- * t
2
sabemos:
vf = vo + at
vo = 0 m/s
Entonces:
h = a
Entonces
t =
Remmplazando se tiene:
t =
t = 14.28 s