Respostas

2014-06-11T17:00:06-03:00
  • Usuário do Brainly
2014-06-11T17:03:22-03:00
Boa tarde NakamuraK!

Temos:

S= 500 m
g= 10 m/s²

Vo= 0 m/s
t=?
V=?

A.

H= gt²/2
500= 10t²/2
500= 5t²
5t²= 500
t²= 500÷5
t²= √100
t= 10 s

B.

ΔS= 500 m
ΔT= 10 s
Vm=?

Vm= 
ΔS÷ΔT
Vm= 500÷10
Vm= 50 m/s