Un tren va a la velocidad de 18m/s, frena y se detiene en 1/4 de minuto.calcular la aceleracion
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Vf = 0
t = 1/4 minuto = 15 segundos
a = Vf - Vo / t
a = 0 - 18 / 15
a = -1.2 m/s²
La aceleración es de -1.2 m/s²