Respostas

2013-11-13T10:03:31-02:00
A)
V=V0-gt
120=0-10.t
120=10t
10t=120
t=120/10
t=12segundos

B)
H=v0t-gt²/2
H=0.12-10.12²/2
H=10.144/2
H=1440/2
H= 720m