Respostas

2014-08-23T18:42:35-03:00
V = vo + at 
20= 0 + a(5) 
5a = 20 
a = 4 m / s² 

f = m . a 
f = 3 . 4 
f = 12 N 
2 4 2
2014-08-23T18:42:53-03:00
A = v / t
a = 20/5
a = 4 m/s²

F = m . a
F = 3 . 4
F = 12 N
1 5 1