Two balls each of radius R, equal mass and density are placed in contact, then the force of gravitation between them is proportional to –
1
\(F\alpha \frac{1}{{{R^2}}}\)
2
F α R
3
F α R4
4
\(F\alpha \frac{1}{R}\)
Two balls each of radius R, equal mass and density are placed in contact, then the force of gravitation between them is proportional to –