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Engenharia Civil ·

Cálculo 4

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DS1095 DIMMOVS Encolha ntcos t sen t 0 t 2π Logo nt sen t cos t Sendo assim F T d l Fnt nt d t Ω 02π cos² t sen t cos t sen² t sen t cos t d t 02π cos³ t sen² t cos² t sen³ t d t 2 02π cos³ t sen² t ω d t 2 Exemplo notF Qx Py y² x² R notF d x d y K x² y² d x d y Usando coordenadas polares temos D ρθ 0 n 1 0 θ π como x² y² ρ² Logo R notF d x d y 0π 01 ρ² ρ d ρ d θ 0π ρ44 01 d θ π2 Jandaia