Mass of two blocks, m₁= m₂ = 40 kg The distance between two blocks, r = 1 m To find: Force of attraction between blocks The force of attraction between masses is given by F = Gm² /r² F = 6.67 x 10⁻¹¹ x (40)² / 1² F = 1.067 x 10⁻⁷ N So, the force between masses is F = 1.067 x 10⁻⁷ N