gearth is basically gravity earth. It calculates what is the value of gravity on earth which is 10Nkg
It would be easy enough to do given what we know about the mass of Jupiter, but the usefulness of the information is questionable. Since Jupiter is made up almost totally of gas, you wouldn't have much to stand on. By the time you descended to the small solid core, you would be heated and crushed to a mess of ash by the pressure. And as long as you are orbiting around Jupiter, which is about all you could reasonably expect to do, you would be weightless. Multiply your weight by 2.364 and that will be your weight on Jupitar. So its a little over double our weight here on earth.
Mars has the lowest gravity of the planets in our solar system.Some people believe than you would weigh the least of Mercury because it is the smallest planet, but Mercury is more dense than Mars and thus has a stronger gravitation force.It's not much between them:Mars - 0.376gMercury 0.38 gEarth (For comparison) 0.99732 gSee related link for the other planets.Mars or Mercury. Both have a surface gravity of about 38% of Earth's.
The escape velocity is given by √2gR Hence it's value Ve on the earth and Vm on the moon is Ve = √2ge.Re Vm = √2gm.Rm Therefore , their ratio = Ve/Vm = √ge.Re/√gm.Rm = √6 x 10 = √60 = 8 nearly