Given,
Mass of the cars, m₁=m₂=3000 kg
The distance between the cars, r=2m
From the universal law of gravitation,
[tex]F=\frac{Gm_1m_2}{r^2}[/tex]Where G is the gravitational constant. The value of G is 6.67×10⁻¹¹ N·m²/kg²
On substituting the known values in the above equation,
[tex]F=\frac{6.67\times10^{-11}\times3000\times3000}{2^2}=1.05\times10^{-4}\text{ N}[/tex]Therefore the force between the cars is 1.05×10⁻⁴ N