Respostas

2014-05-20T08:11:17-03:00
A)
Função: S = So + Vt
S = 100 + 80t

B)
S = 100 + 80(3)
S = 100 + 240 = 340 m

C) 420 = 100 + 80t
80t + 100 = 420
80t = 420 -100
80t = 320
t = 320 / 80
t = 4 s                   
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