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a = (v-v0): t y da a=(96-50) : 7=6.571428571km/h
Los datos que tienes son:
vi = 50 km/h
vf = 96 km/h
t = 7 s
a = ?
Pasas las unidades al SI
vi = (50 km/h) (1000 m) / (1 km) (1 h) / (3600 s) = 13,89 m/s
vf = (96 km/h) (1000 m) / (1 km) (1 h) / (3600 s) = 26,67 m/s
Calculamos la aceleración
a = (vf - vi)/t
a = (26,67 m/s - 13,89 m/s)/7s
a = (12,78 m/s)/7s
a = 1,83 m/s²
Respuesta.
a = 1,83 m/s²