Tópicos da Física 1
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PiR2 :: Física :: Mecânica Geral
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Tópicos da Física 1
64. (UFRGS) Um dinamômetro fornece uma leitura de 15 N quando os corpos x e y estão pendurados nele, conforme mostra a figura. Sendo a massa de y igual ao dobro da de x, qual a tração na corda que une os dois corpos?
![Tópicos da Física 1 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)
Gabarito: T= 10N
Gabarito: T= 10N
luizfelipe3123- Iniciante
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Re: Tópicos da Física 1
Na resolução dessa questão, eu considerei que essa figura está em equilíbrio, logo a força que está mostrada no dinamômetro é igual ao peso, x+y ou 3x, assim descobri que
15N= 3x . g
Assim, considerei que a gravidade é igual a 10, por fim vi que x=0,5kg, logo y= 1kg e ,por fim, a tração seria igual a 10N.
Gostaria de saber se meu raciocínio estaria certo.
15N= 3x . g
Assim, considerei que a gravidade é igual a 10, por fim vi que x=0,5kg, logo y= 1kg e ,por fim, a tração seria igual a 10N.
Gostaria de saber se meu raciocínio estaria certo.
luizfelipe3123- Iniciante
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Re: Tópicos da Física 1
Sua solução está correta
Mas vc errou na escrita de unidades:
É obrigatório deixar um espaço entre o valor da grandeza e sua unidade.
Além disso, nas equações deve haver espaço entre cada membro e o sinal =
15 N = 3x . g , x = 0,5 kg , y = 1 kg , 10 N
Mas vc errou na escrita de unidades:
É obrigatório deixar um espaço entre o valor da grandeza e sua unidade.
Além disso, nas equações deve haver espaço entre cada membro e o sinal =
15 N = 3x . g , x = 0,5 kg , y = 1 kg , 10 N
Elcioschin- Grande Mestre
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luizfelipe3123 gosta desta mensagem
Re: Tópicos da Física 1
Fiz assim:luizfelipe3123 escreveu:64. (UFRGS) Um dinamômetro fornece uma leitura de 15 N quando os corpos x e y estão pendurados nele, conforme mostra a figura. Sendo a massa de y igual ao dobro da de x, qual a tração na corda que une os dois corpos?
Gabarito: T= 10N
Vamos chamar a tração entre X e Y de ''Tw''
![Tópicos da Física 1 Physic10](https://i.servimg.com/u/f67/20/56/91/14/physic10.jpg)
Podemos analisar o comportamento de cada força individualmente em cada corpo (X e Y).
Considerados x e 2x as massas de X e Y. Logo, assumindo que a gravidade é 10m/s2, temos Px = 10x e Py = 20x
Em X -> Tw + 10x = T
Em Y -> Tw = 20x
Podemos substituir Tw = 20x na primeira equação do sistema. Ficamos com:
Tw + 10x = T
20x + 10x = 15
30x = 15
x = 0,5
Sendo Tw = 20x, substituímos x por 0,5:
Tw = 20 . 0,5 = 10N.
matheus_feb- Recebeu o sabre de luz
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