Respostas

2014-04-07T12:18:26-03:00
S = So + Vot +  \frac{at^2}{2}

S - So =  Vot +  \frac{at^2}{2}

\Delta S=  Vot +  \frac{at^2}{2}

Vo ~> velocidade inicial
t ~> tempo
a ~> aceleração

fica :

\Delta S= 4(40)+  \frac{3(40)^2}{2}

\Delta S= 160 + 2400

\Delta S= 2560 m
2014-04-07T12:19:05-03:00
S=So+Vo.t+at²/2
S=0+4.40+3.40²/2
S=4.40+4800/2
S=160+2400
S=2560