Question

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

Answer 1

ANSWER

ANSWERg=r2GM

⟹M= GgR2

Here,

gaGb=21

and

RARB=2

⟹

⟹ MAMB=gAgB

(RARB)

2

⟹ MAMB

=(2)

=21

⟹MB=2MA