Question

A planet has mass four times of Earth and radius two times that of Earth . if the value of "g" on the surface of Earth is 10 m/s . Calculate acceleration due to gravity on the planet.​

Answer 1

Answer:

The weight of an object of mass ‘m' at the surface is given by:

mg = GMm/(R^2), where M and R are the mass and radius of the Earth. G is the universal gravitational constant.

So g=GM/(R^2).

Clearly, quadrupling M and doubling R will leave the value of g unchanged.

Answer 2

Answer:

The weight of an object of mass ‘m' at the surface is given by:

mg = GMm/(R^2), where M and R are the mass and radius of the Earth. G is the universal gravitational constant.

So g=GM/(R^2).

Clearly, quadrupling M and doubling R will leave the value of g unchanged.