Question

A planet has a diameter and average density twice that of the earth. The acceleration due to its gravity on surface will be

Answer 1

Explanation:

Radius. of earth =r

Radius of a planet=2r

density =mass/volume

=M/4/3*πr^3= density of earth

density of new planet=M/4/3*π8r^3

mass of new planet= 16 M

gravity=16MG/4r^2

=4g

= 39.2 m/ s^2