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Los datos son:
vi = 0 m/s
t = 160 s
vf = 70 km/h
a = ?
Pasa las unidades al SI
vf = (70 km/h) (1000 m) / (1 km) (1 h) / (3600 s) = 19,44 m/s
Calculamos la aceleración
a = (vf - vi)/t
a = (19,44 m/s - 0 m/s)/160s
a = (19,44 m/s)/160s
a = 0,12 m/s²
Respuesta.
a = 0,12 m/s²