the mouse here to see the dynamic menu)
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;
are two types of energy:
- Potential Energy
- Kinetic Energy
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.
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.
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.
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.
wind up a clock which type of energy it possesses? Discuss with
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.