Respostas

2014-05-12T15:02:10-03:00
A) S=S0+ V0t+at²/2
S= -20+10t-2t²
S0= -20
V0= 10m/s
a= -4m/s²

B) S(2)=-20 +10(2)-2(2)²
S(2)= -20+20-8
S(2)= - 8m

V(t)= 10-4t
V(2)=10-4(2)
V(2)=10-8
V(2)=2m/s
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