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Types of Energy

There are two types of energy:

                    - Potential Energy                                       

                    - Kinetic Energy


Potential Energy:  It is the energy a body possess by virtue of its position or state.

The work done to raise a body is equal to its increase in potential energy. So potential energy = Work done

                       = F*S = mgh

Where m = mass in kg.

           g = acceleration due to gravity in m/s2.

           h = height to which body is raised in m.

 here  F = mg = weight of the body.

Chemical, gravitational and strain energies can be stored by things; the energy is held by them, waiting to be used. Energy that can be held in readiness is called Potential Energy. Chemical, gravitational and strain energies are all potential energies.

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Kinetic Energy:  The energy a body possesses due to its motion is called Kinetic Energy. All moving bodies posses Kinetic Energy.

                  Kinetic Energy = 1/2 * m * v2

Where m = Mass of the body in kg, and v is the velocity in m/s.

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Activity : Give an example of something that has (a) Gravitational energy due to its high position (b) Strain energy because it is stretched (c) Chemical energy. Discuss your classmates and class teacher.

Activity : When we wind up a clock which type of energy it possesses? Discuss with your teacher.

Activity : Made a water wheel out of the metal foil you get underneath the lid of a 1 kg tin of powered milk or ghee use the refill of a ball point pen to rotate it below the water coming down from a tap or under a rotating electric fan.





Sources of energy

Types of energy

Forms of energy

Energy Conservation

Transformation of energy

Measurement of energy



Combustion engines

Joule's experiment

Fun Facts