Question

If all planets were the same distance from the sun, which would have the largest gravitational force between itself and the sun? Why? and

If all planets were the same mass, which would have the lowest gravitational force between itself and the sun? Why?

Answer 1

Basically gravitational force exists between any two objects possessing mass
It is given by
Fg= GmM/r^2
Where m and M are the masses of the objects and r is the distance between them and G is a constant

So clearly, the planet with tha largest mass should have highest gravitational pull by the sun, I.e, Jupiter

Now if they have the same mass, the gravitational pull should be same according to the formula