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Exercício de gravitação

por JULIANA SILVA () Difícil Tuesday, May 26th, 2020


Uma barra rígida de comprimento L e com massa desprezível está fixa em seu centro e livre para rotacionar. Em cada uma de suas extremidades existe uma barata de massa m. Inicialmente, o conjunto barra-baratas gira com uma velocidade angular igual a 0,8rad/s. Uma dessas baratas então caminha para o centro da barra. Neste instante, qual a nova velocidade angular do conjunto barra-baratas?

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