Respostas

2013-05-28T20:36:08-03:00

V=230 km/h = 63,9 m/s

Vo= 180 km/h= 50 m/s

t= 39s

a=?

usamos essa fórmula:

V=Vo+at

63,9=50+a.39

63,9-50=39a

39a=13,9

a=13,9/39 m/s²