ok, this is the equation for potential energy, where P is the potential energy of a mass a height h above a reference surface when the acceleration due to gravity is g writing this in terms of g is simple: g=P/mh without numbers, it is hard to go farther, however, near the surface of the Earth g has the value of 9.8m/sec/sec
Potential Energy = mgh P=mgh g=P/mh
how old are you? and what you could do is sit down with your mother and tell her that you are old enough and can make decisions on your own, (not like going out and whatever) not those type of decisions, but if you listen to your mother well enough, and are a good,mature kid. Then her gf shouldnt feel she has place to come in and try to make decisions that influence your life, let your mom know that you dont want, or need that. as far as them wanting you to move away, find out from your mother if this is true, and why, if so, if you arent happy, could you go stay with your dad? another family relative? hope everything works out.
I assume you wish to rearrange the gravitational potential energy equation: – P = mgh to obtain: – g = P/mh
I hope this is what you were looking for?