Question

The weight of an object on a planet depends not only on its mass but also on its distance from the planets center this table lists weight of 80 kg on each planet in the solar system Uranus has more than 14 times as much mass as earth yet the gravitational force is less explain how this could be

Answer 1

You just pointed out that the gravitational force also depends
on the distance from the planet's center. The radius of Uranus
is about 4 times the Earth's radius.  That fact alone means that
the gravitational force on the surface is 1/4² = 1/16 its value on
Earth's surface.  So increasing the planet's mass by a factor of
14 doesn't compensate for the 1/16 reduction, and the gravitational
force on Uranus is less than on Earth.