Calculate the gravitational force of attraction between a car of mass 600 kg and a bike of mass 100 kg separated by a distance of 20 m.

Given: 

Mass of the car (m₁) = 600 kg 

Mass of the bike (m₂) = 100 kg 

Distance between them, r = 20 m 

Gravitational constant G = 6.67 × 10^–11 N m^–2 kg^–2 

∴ The gravitational force of attraction,

$\mathrm{F}=\frac{{\mathrm{Gm}}_1{\mathrm{m}}_2}{{\mathrm{r}}^2}=\frac{6.67\times {10}^{-11}\times 600\times 100}{(20{)}^2}=1.0005\times {10}^{-8}\mathrm{N}$