Question

if the mass of the earth is doubled and radius is halved to the present time what will be the gravity of the earth​

Answer 1

Answer:

It would become half as :

g= GMm /r*r

g=G×2Mm /r*r/1/2

g=2(GMm)/r*r

Answer 2

Explanation:

Let M be the mass

and R be the Radius

M1 =2M

R1 = R/2

g = GM/R^

= G×2M/ (R/2^)

=2GM/R^/4

=8Gm/R^

=8g (g=GM/R^)

=8× 9.8

=78.4 m/s^