Question

b.The radius of planet A is half the radius of planet B.If the mass of A is M^A,what must be the mass of B so that the value of g on B is half that of its value on A?Ans:2M^A​

Answer 1

Answer:

g=R2/GM

⟹M=Gg/R2

Here, gA/gB=21

 and RA/RB=2

⟹MA/MB=gA/gB(RA/RB)2

⟹MA/MB=21(2)2