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vf = 0
vi= ?
g = 9,8m/s^2
tiempo (t) = 10s
encontramos vi
formula
vf = vi -g *t se toma -g porque el cuerpo va hacia arriba
g*t = vi
9,8m/s^2 *10s = vi
98m/s = vi
s = vi *t -g*t^2/2
s = 98m/s *10s -( 9,8m/s^2 * 10s *10s)/2
s = 980m - 490m
s = 490m