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Masses of the spheres are:
m₁ = 10kg
m₂ = 5kg
distance, r = 5m

Force of attraction between them is due to gravitational attraction.

F=\frac{Gm_1m_2}{r^2} = \frac{6.67 \times 10^{-11} \times 10 \times 5}{5^2}\ N=1.334 \times 10^{-10}N

The force of attraction between the spheres is 1.334 × 10⁻¹° N
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