Question

If the mass of one object is doubled and mass of other remains the same, moreover if distance between them is halved then how does the gravitational force change?

Answer 1

F = $\frac{GMm}{d^2}$ = $\frac{G2Mm}{{\frac{d}{4}}^2}$ = ${\frac{8GMm}{d}}^2$

The gravitational force will be 8 times.