Question

What is meant by work done is stored int the form of potential energy

Answer 1

The potential energy is a function of some field. Whenever there is a field of a force of some kind, any object that interacts with the force gains energy. This energy comes as a result of the interaction of the object with the force or the field. We call this the potential energy.

For example, around a mass, we have the gravitational field. Any mass in that field will experience a force and thus will have an energy associated with it. This is the gravitational potential energy. Similarly, we see the following kinds of potential energy.