DynamicMenu(Move the mouse here to see the dynamic menu)




We know from the common experience that the capability of our body for doing work goes down after it has done some work i.e. we get tired when we do some work and our body looses energy. When an external agent does work upon a body its energy or capability of doing work increases. While when the work is done by the body its energy decreases.

                      We define energy as the capability to do work.

e.g.  A spring stretched by an external force obviously has a greater capability to do work than an unstreched spring.

How much work is done when we stretch a spring a distance x from its equilibrium position?







Sources of energy

Types of energy

Forms of energy

Energy Conservation

Transformation of energy

Measurement of energy



Combustion engines

Joule's experiment

Fun Facts