what is absolute potential energy please explain it

We can define the potential energy of an object within a
conservative force field (gravitational,elastic, electromagnetic
forces).

To calculate the difference of potential energy of
an object, between two positions, we'll have to determine the work nedeed for the object
to move between these positions. Once we know the value of the work done, the potential
energy is the negative of this value.

In the gravitational
field of forces, the potential energy is:

PE =
m*g*h

m is the mass of the
object

g is the gravitational acceleration = 9.8[m/s^2]
approx.

h is the height measured from the surface of the
Earth to the position of the object whose potential energy has to be found
out.

If we want to determine the potential energy of a
spring, we'll have the formula:

PE =
k*x^2/2

k is the spring
constant

x is the displacement of the spring with respect
to the equilibrium position.