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vi = 62 km/h
g = 9,8 m/s²
h = 4m
vf = ?
Calculamos el tiempo.
t = √2h/g
t = √2 (4 m) / 9,8 m/s²
t = √8 m / 9,8 m/s²
t = √0,82
t = 0,9 s
Calculamos la velocidad.
vf = gt
vf = (9,8 m/s²) (0,9s)
vf = 8,82 m/s
La velocidad final es 8,82 m/s