Question

what is the value of g on the surface of a planet whose mass as well as radius is half of the value for earth

Answer 1

Question:

what is the value of $g$ on the surface of a planet whose mass as well as radius is half of the value for earth

ANSWER:

by definition

$g = G * M / R^2$ (G- gravitation constant, M- mass of the planet, R- radius of the planet)

since M1=M/2

and R1=R/2

the $g1 = g*2$

so, new "g" will be 2 times LARGE then original one

if the original $g = 9.81\mathrm{m / c^{\wedge}2}$

the new one $g1 = 19.62\mathrm{m / c^{\wedge}2}$