Energy is the capacity to do work. Work is the result when a force moves an object by a distance. So Energy is the capacity to move an object by a distance by applying a force. Now kinetic energy is what? and what is potential energy. Suppose i am sitting on the surface of earth what is the energy i have? Do i have zero energy? Suppose i remove the surface below where i sit i will go down. So can i say i have some energy?