If the work of a force field acting on a body that moves from a start to an end position is determined only by these two positions, and does not depend on the trajectory of the body, then there is a function known as potential energy that can be evaluated at the two positions to determine this work.
https://en.wikipedia.org/wiki/Potential_energy
Kinetic energy is the energy of mass in motion. The kinetic energy of an object is the energy it has because of its motion.
http://www.livescience.com/46278-kinetic-energy.html
Elastic potential energy is the energy an object has in it due to being deformed. Any object that can be deformed and then return to its original shape can have elastic potential energy. One common object to look at when discussing elastic potential energy is a spring.
http://study.com/academy/lesson/elastic-potential-energy-definition-formula-examples.html
If we want to change the kinetic energy of a massive object, we must do work on it. For example, in order to lift a heavy object, we must do work to overcome the force due to gravity and move the object upward. If the object is twice as heavy, it takes twice as much work to lift it the same distance.
http://www.livescience.com/46278-kinetic-energy.html
In these two cases, the kinetic energy is converted to potential energy because while it is not actually doing work, it has the potential to do work. If we drop the object from the shelf or release the spring, that potential energy is converted back into kinetic energy. Kinetic energy can also be transferred from one body to another in a collision, which can be elastic or inelastic. One example of an elastic collision would be one billiard ball striking another.
http://www.livescience.com/46278-kinetic-energy.html
Perhaps the most important property of kinetic energy is its ability to do work. Work is defined as force acting on an object in the direction of motion. Work and energy are so closely related as to be interchangeable.
http://www.livescience.com/46278-kinetic-energy.html
If the electric charge of an object can be assumed to be at rest, then it has potential energy due to its position relative to other charged objects. The electrostatic potential energy is the energy of an electrically charged particle (at rest) in an electric field.
https://en.wikipedia.org/wiki/Potential_energy
In physics, potential energy is the energy that an object has due to its position in a force field or that a system has due to the configuration of its parts.
https://en.wikipedia.org/wiki/Potential_energy
Common types include the gravitational potential energy of an object that depends on its vertical position and mass, the elastic potential energy of an extended spring, and the electric potential energy of a charge in an electric field. The SI unit for energy is the joule (symbol J).
https://en.wikipedia.org/wiki/Potential_energy
The function. is called the potential energy of a linear spring. Elastic potential energy is the potential energy of an elastic object (for example a bow or a catapult) that is deformed under tension or compression (or stressed in formal terminology).
https://en.wikipedia.org/wiki/Potential_energy
what object has elastic potential energy
Any object that can be deformed and then return to its original shape can have elastic potential energy. An object with elastic potential energy is any object that can be deformed and then return to its original shape can have elastic potential energy.