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A pendulum hanging still at its highest point (potential energy) is released, converting its potential energy to kinetic energy as it swings back and forth. An object held above the ground (potential energy) is dropped, converting its potential energy to kinetic energy as it accelerates towards the ground.
An example is sand on a beach stores the energy from the sun in it. A stretched spring has stored potential energy that is released when the spring is returned to its unstretched state.
Chemical energy is a form of potential energy stored in the bonds of chemicals. When these bonds are broken, the potential energy is converted into other forms of energy, such as kinetic energy.
Potential energy can be saved up for future use. This type of energy is stored in an object based on its position or configuration, ready to be converted into kinetic energy when needed. Examples include a wound-up spring or water held in an elevated reservoir.
Chemical energy is a form of potential energy stored in the bonds of chemical compounds. When a chemical reaction occurs, this energy is released or absorbed. Common examples include the energy stored in food, gasoline, and batteries.