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Profa. Salete Souza de Oliveira
Home: http://www.professores.uff.br/salete
Bibliografia Básica
1. BEER & JOHNSTON – Mecânica Vetorial para Engenheiros – Estática
3. R. C. HIBBELER – Estática – Mecânica para Engenharia
Capítulo IV
Resultante de Sistemas de Forças
Universidade Federal Fluminense - UFF
Escola de Engenharia de Volta Redonda – EEIMVR
Departamento de Ciências Exatas
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Capiv1

  • 1. Profa. Salete Souza de Oliveira Home: http://www.professores.uff.br/salete Bibliografia Básica 1. BEER & JOHNSTON – Mecânica Vetorial para Engenheiros – Estática 3. R. C. HIBBELER – Estática – Mecânica para Engenharia Capítulo IV Resultante de Sistemas de Forças Universidade Federal Fluminense - UFF Escola de Engenharia de Volta Redonda – EEIMVR Departamento de Ciências Exatas
  • 3. &&&& '''' (((( )))) **** + %+ %+ %+ % , %, %, %, % ****
  • 6.
  • 7.
  • 8. //// FrM Xo = ( ) FdrsenFrFsenMo === θθ #### ....
  • 9. Considere a força F aplicada no ponto A da figura. M r Fo A X= r pode se deslocar de O ate qualquer ponto sobre a linha de ação de F M r Fo B X= M r Fo c X= F apresenta a propriedade de um vetor deslizante e pode devido a esse ato, agir em qualquer ponto sobre sua linha de ação e ainda produzir o mesmo momento em relação ao ponto O
  • 10. ( )2M r F r F r F F r Fo 1 2 1X X X X= + = + =
  • 11.
  • 12.
  • 13.
  • 14. θ θ o o 0 180θ≤ ≤
  • 15. aa FdM = ( ) FdMz =max ' FdMz =
  • 16. ( )Fru ×⋅= aaM ( ) ( ) zyx zyx azayax aa zyx zyxazayaxa FFF rrr uuu M FFF rrruuuM =×⋅= ⋅++= Fru kji kji