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Si parte del reposo su Vo es 0
Vo=0
e= 50m
a= 8cm/s²
Vf= ?
t=?
Primero convertimos los cm/s² a m/s²
1m/s² 100cm/s²
x 8cm/s²
8cm/s² * 1m/s²
--------------------- = 0.08m/s²
100 cm/s²
Aplicamos la formula de m.r.u en reposo
V²=2ad
V²=2(0.08m/s²)(50m)
V²= 8m²/s²
V= √8m²/s²
V=2.83 m/s
Despejamos una formula V=at me queda:
t=V/a
2.83m/s
t= ------------- = 35.38s
0.08m/s²
Espero que te sirva