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the gravational force is between two objects 18 N . if the distance between them is tripled and their masses are doubled. then what is the gravitational force of the two objects

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F_1 = (G m_1 m_2 )/(r^2 ) = 18N F_2 = (G M_1 M_2 )/(R^2) R = 3r M_1 = 2m_1 M_2 = 2m_2 F_2 = (G 2m_1 2m_2)/((3r)^2) = (4)/(9) * (G m_1m_2)/(r^2) = (4)/(9) * 18N
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