Question

The table below shows the acceleration of gravity on different bodies in the solar system.

Answer 1

It is Pluto !! The PE is mgh !!

As mass is constant everywhere and height is given 1 m thus the value of g determines the PE !!

So g is least on Pluto thus the PE will be least !!

Answer 2

Do you remember the formula for potential energy ?

PE = (mass) (gravity) (height)

If the mass and the height are always the same, then the least PE comes from the least gravity. Surely you can find THAT in the table.