If R is the radius of a planet and g is the acceleration due to gravity, then the mean density of the planet is given by

If R is the radius of the earth and g the acceleration due to gravity on the earth's surface, the mean density of the earth is

If R is the radius of the earth and g the acceleration due to gravity on the earth's surface, the mean density of the earth is

The escape velocity for a planet is upsilon_e . A tunnel is dug along a diameter of the planet and a small body is dropped into it at the surface. If R is the radius of the planet and g is the acceleration due to gravity at its surface then the body will reach the centre of the planet in time

How does acceleration due to gravity vary with mass and radius of the planet ?

A planet has twice the values of mass and radius of earth. Acceleration due to gravity on the surface of the planet is :