How are the planets mass and gravitational force related

Question

I need help with force mass and gravitational force

Answer 1

Gravitational force = GmM/r²

where G is the gravitational constant

m is the mass of body 1

M is the mass of body 2, and 

r is the distance separating the two masses.

 

So the gravitational force is proportional to the planet's mass.  If the mass doubles, tthe force double; if the mass triples, the froce triples, etc.