Respostas

2013-07-02T01:12:55-03:00
Dai tu usa a formula simples de torricelli V^2=Vo^2+2•a•d substituindo V^2=0^2+(2•4•50)=V=√400=20m/s
2013-07-02T06:56:51-03:00

V²=Vo²+2ad

V²=0²+ 2*(4)*(50)

V²=0+400

V²=400

V= V400

V=20 m/s