Potential energy is energy done to place something somewhere, against a force (not any force, it must be a so-called "conservative force", but I am only mentioning this for completeness sake). Specifically, gravitational potential energy is the energy an object has when it is raised above ground level. You need to supply energy (as work) to lift it up; in theory, this energy can be recovered if the object falls down.
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A pendulum transfers potential gravitational energy (at the top of its swing) to kinetic energy (movement at the bottom of the swing) and then back again (at the top on the other side).
An advantage for gravitational energy is that gravitational energy is that it can be made/created very easily and transformed easily as well
Gravitational + Potential = 100 If you have 67 J of potential energy your gravitational energy would be 33 J.
It is different because gravitational potential energy is when something is getting pulled by gravity and potential energy is stored energy which means that it is not moving and the energy is not getting released as gravitational energy is.
Gravitational energy is the potential energy associated with gravitational force. If an object falls from one point to another point inside a gravitational field, the force of gravity will do positive work on the object, and the gravitational potential energy will decrease by the same amount.