Respostas

  • Usuário do Brainly
2014-05-16T21:20:51-03:00
N=Fp=mg=5.10=50N
u(c)=?
Fr=m.a
Fa=u(c).N
F-Fa=m.a
15-u(c).50=5.2
-u(c).50=-5
>>u(c)=5/50 =1/10=0,1