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Exercício de Sistemas dissipativos (PUCSP)

por Felipe Dias PEreira (PUCSP - 1998) Normal Thursday, June 2nd, 2011

Exercício:

A figura mostra o perfil de uma calha de experimentos. Um carrinho de massa 0,2Kg é lançado no ponto A, com velocidade 3 m/s e desliza ao longo da calha, atingindo uma altura máxima idêntica à altura do lançamento. Qual é a quantidade de energia mecânica dissipada durante o movimento? 

 

Informações Adicionais:

Utilizei o Teorema do trabalho das forças não conservativas. Tentei achar no momento um e depois no momento dois, em cima da próxima ‘crista’.

Calro, não consegui.. pensei certo pelo menos?  ^^


Respostas:

18 Respostas a “Sistemas dissipativos (PUCSP)”

Prof. Marcus Aurélio Alves diz:

A EM = Ec
Daí usando a fórmula da Ec= mv²/2 = 0,2.3³/9 = 0,9J

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