Respostas

2013-11-13T10:53:56-02:00

h max ---> v=0 

v = v0 + a x t
0 = 20 -10 x t
- 10t = - 20
t = 20 / 10
t = 2 s

s = 0 + 20 x 2 - 5 x (2)²
s = 40 - 5 x 4 
s = 40 - 20
s = 20 m
2 2 2