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Trabalho de fisica. gente nao to conseguindo fazer o meu trabalho.
Um bloco de massa igual a 4kg encontra-se em repouso sobre um plano horizontal sem atrito, como mostra a figura. Num determinado instante, aplicam-se sobre ele duas forças horizontais f1 e f2 de intensidades 30n e 90n, respectivamente. Determine a intensidade da aceleraçao adquirida pelo bloco. Dado: g=10/ms (ao quadrado)
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