Respostas

2013-12-10T16:40:16-02:00
Ema=Emb
Ec+Ep=Ec+Ep
0+Ep=Ec+0
m.g.h=mv^2/2
g.h=v^2/2
10.7,2=v^2/2
72=v^2/2
72.2=v^2
v^2=144
v=√144
v=12 m/s