Objects that are raised high have what is called gravity Potential energy (gravitational potential energy). For gravity Potential energy, the magnitude is determined by the relative positions of the earth and objects on the ground. The larger the volume, the higher the position and the greater the ability to Do work, the greater the gravity Potential energy of the object, the expression is: Ep=mgh.

gravity Potential energy

formulas ：PE = m x g x h

m = Quality

g = gravity acceleration

h = Height