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Exercício de Calcule a aceleraçao do Bloco A e indique o sentido do movimento(2º lei de newton)

por Daniel Reina ( Professor) Difícil Tuesday, May 20th, 2014


F1:100N      F1=Força de Traçao

F2:8N          F2=Força de Atrito

F3:40N        F3=Peso

F4:40N        F4=Normal(Reação)

Calcule a Aceleraçao do Bloco A e indique o sentido do movimento dado:g=10m/s²


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23 Respostas a “Calcule a aceleraçao do Bloco A e indique o sentido do movimento(2º lei de newton)”

vitinho diz:

F4=F3 portanto elas se anulam.
Sabendo disso a força resultante = F1 – F2.
força resultante= massa * aceleração
Portanto m * a = F1 – F2
Mas como nao é fornecido a massa, não é possível chegar a aceleração.

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