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Sources of energy!sources_of_energy2.htm;
Types of energy!types_of_energy2.htm;
Forms of energy!forms_of_energy2.htm;
Transformation of energy!transformation_of_energy3.htm;
Measurement of energy!measurement_of_energy4.htm;
Combustion Engine!Combustion engine1.htm;
Joule's Experiment!joule's experiment.htm;
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.
A spring stretched by
an external force obviously has a greater capability to do work
than an unstreched spring.
ow much work is
done when we stretch a spring a distance x from its equilibrium