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vi = 20 km/h
vf = 80 km/h
t = 10 minutos
a = ?
d = ?
Pasamos las unidades al SI
vi = (20 km/h) (1000 m) / (1 km) (1 h) / (3600 s) = 5,56 m/s
vf = (80 km/h) (1000 m) / (1 km) (1 h) / (3600 s) = 22,22 m/s
1 minuto = 60 segundos
60 * 10 = 600 segundos
Calculamos aceleración.
a = (vf - vi)/t
a = (22,22 m/s - 5,56 m/s)/600s
a = (16,66 m/s)/600s
a = 0,028 m/s²
Calculamos distancia.
d = (vf + vi)/2 * t
d = (22,22 m/s + 5,56 m/s)/2 * 600s
d = (27,78 m/s)/2 * 600s
d = 13,89 m * 600
d = 8334 m