Respostas

2013-10-18T16:24:20-03:00
V= Vo -  a.t 
13 = 28 - 5.t
t = 15/5
t = 3 s
 S =  v.t 
S= 13.5
S =  65m 
  
2 4 2
2013-10-18T19:08:17-03:00
3 mts
s=v-r
s=28mts/s-5mts ao quadrado
s=28-25
s = 3