Stored Energy

• Stored energy is the form of energy that is released by chemical or physical reactions.
• The examples of stored energy are:

a) Chemical Energy



- energy stored in substances such as fuels, food, batteries and green plants.
- When these substances undergo chemical reactions, the chemical energy stored inside is released and converted to other forms of energy.
- Food contains chemical energy which is used to provide energy for body.
- Green plants convert light energy from the sun into chemical energy during photosynthesis.

b) Nuclear Energy



- energy stored in the nucleus of an atom.
- Radioactive materials store nuclear energy.
- Released in the form of hear, light, sound and radioactive rays.
- Radioactive rays are dangerous and harmful and also can cause serious illness or even death.

c) Potential Energy



- Energy stored in an object because of its position or its condition.
- Elastic potential energy is the stored energy of stretched or compressed objects.
- A stretched string on a bow and a compressed spring on a spring toy possess potential energy.
- Gravitational potential energy is teh energy possessed by an object due to its position from the ground.
- The higher an object, the more gravitational potential energy it possesses.
- When a crane lifts an object, the object has potential energy.