Let ME be the mass of the Earth and m be an object on the surface of the Earth. Let R_{E} be the radius of the Earth. According to the universal law of gravitation, weight W_{E} of the object on the surface of the Earth is given by,

Let MM and RM be the mass and radius of the moon. Then, according to the universal law of gravitation, weight WM of the object on the surface of the moon is given by: