Question

Two identical spheres of radius $R$ made of the same material are kept at a distance $d$ apart. Then the gravitational attraction between them is proportional to:

• A. $d^{-2}$
• B. $d^2$
• C. $d^4$
• D. $d$
• E. $d^{-4}$

Answer 1

The correct option is A $d^{-2}$

$F=G\frac{mm}{d^2}$
$F\propto \frac{1}{d^2}$ or $F\propto d^{-2}$
The gravitational attraction between the identical sphere is proportional to $d^{-2}$.