selina-hall_60b9bae8dcb14
selina-hall_60b9bae8dcb14
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1) Vm= km/hr > 50/1,25 = 40km/h 2)a- retardado pois a aceleração é negativa b- S= -20 +5.4 = 0 ; aos 4s estará no ponto inicial c- aos 4s