Question

solve the following problem the radius of planet A is half of radius of planet B mass of A is MA what must be the mass of B so that G on B is half of small G on A.​

Answer 1

Answer:

So planet B needs double the mass of planet A in order to have half its gravitational acceleration, being twice as big. This is because g is proportional to the mass, but inversely proportional to the radius, squared.

Hope it helps.