Question

A planet & has mass 2 times and radius
3 times that of the Earth. what is the
acceleration due to grauity on the planet, if the acceleration
due to gravity on
the Earth is 10 m/s2
​

Answer 1

A planet has mass 2 times and radius 3 times that of the Earth.

The acceleration due to gravity on the planet, if the acceleration due to gravity on the Earth is 10 m/s2

g = GM/R^2

g' = G*2M/9R^2

So,

$\frac{g'}{g} = \frac{2}{9}$

$g' = \frac{2}{9} \times 10 = \frac{20}{9}$