A sphere of mass 40kg is attracted by a sphere of mass 80 kg by a force of 2.5 ×10^-6 N, when their centres are 300 mm upward. Find the value of G.
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F = Gm1m2 / d^2
G = Fd^2 / m1m2
G = 2.5 x 10^-6 x (300 x 10^-3)^2 / 40 x 80
G = 0.225 x 10^-6 / 3200
G = 7.031 x 10^-11
G = Fd^2 / m1m2
G = 2.5 x 10^-6 x (300 x 10^-3)^2 / 40 x 80
G = 0.225 x 10^-6 / 3200
G = 7.031 x 10^-11
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