Respostas

2013-12-10T04:50:00-02:00
I) S = So + Vo . t + 1 / 2 . a . t
II) V = Vo + a . t
III) V² = Vo + 2 . a . Δs

Vo = 20 m/s
t = ?
a = - 5 m/s²
V = 0

Vc vai usar a II ->
0 = 20 - 5 . t
- 20 = - 5t
t = 4 s

1 5 1