The value of acceleration due to gravity 'g' on the surface of the moon with radius 1/2 that of the earth and same mean density as that of the earth

Options

A. g/4
B. g/2
C. 4 g
D. 8 g

Answer

b

Explanation

`(g_(2))/(g_(1))=(rho_(2))/(rho_(1))xx(R_(2))/(R_(1))=1xx(1)/(2)`
`g_(2)=(g)/(2).`