Respostas

2014-07-26T13:37:15-03:00
Converta km/h para m/s.

 \frac{180}{3,6} =50m/s

v=vo+a*t

50=0+a*12

50=a*12

a= \frac{50}{12} =4,16666666...m/s^2

Convertendo para km/h².

4,1666666...*12960=54000km/h^2