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LEIS DE NEWTON- FORÇA DE TRAÇÃO OU TENSÃO OU FORÇA ATRITO
a figura representa uma composição ferroviária com uma locomotiva de massa 14000kg e 3 vagões de massa 1000kg cada um, movendo- se com aceleração constante a =10 m/s². sejam F1,F2E F3OS MODULOS DAS FORÇAS EXERCIDAS POR CADA UMA DAS BARRAS DE ACOPLAMENTO (1),(2) E(3), RESPECTIVAMENTE,SOBRE OS VAGÕES. A LOCOMOTVA DESENVOLVE UMA FORÇA DE MÓDULO f. desprezando- se os atritos , calcule : F, F1, F2 E F3
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