energy-work- power-transformation-phpapp02.ppt

energy-work- power-transformation-phpapp02.ppt

1. What is energy?What is energy?
Energy is a property Energy is a property
of objects which can of objects which can
be transferred to be transferred to
other objects or other objects or
converted into converted into
different forms.different forms.

3. Two Main Types of EnergyTwo Main Types of Energy
•Potential EnergyPotential Energy •Kinetic EnergyKinetic Energy
is the stored is the stored
energy of energy of
position position
possessed possessed
by an object.by an object.
Examples are:
is the is the
energy of energy of
motion motion
possessed possessed
by an by an
object.object.
Examples are:

4. Back

5. back

6. What energy will form if we What energy will form if we
combine potential energy and combine potential energy and
kinetic energy?kinetic energy?
Potenti
al
Energy
Kinet
ic
Ener
gy
Mechanic
al Energy

7. What is mechanical energy?
Mechanical energy is the
sum of potential energy
and kinetic energy.
It is the energy
associated with the motion
and position of an object.

10. Various Form of Potential
Energy
gravitatio
nal
chemic
al
elasti
c
electric
al
nucle
ar

11. Various Form of Kinetic Energy
motio
n
radia
nt
soun
d
therm
al
wav
e

13. How are those different How are those different
energies become useful to energies become useful to
us?us?
Energy transformation is a Energy transformation is a
change from one form of change from one form of
energy to another.energy to another.
Those different energies
become useful to us
through the process of
ENERGY
TRANSFORMATION .

14. Energy transformation, also known as
energy conversion, is the process of
changing energy from one form to another.
According to the law of conservation of energy,
energy can neither be created nor destroyed. In
other words, energy does not appear out of
anywhere and disappears into nothing. It
transforms from one form into another.

15. Different types of Different types of
energy energy
TransformationTransformation

16. As mentioned before, energy can transform from As mentioned before, energy can transform from
one form into another. Below are the types of one form into another. Below are the types of
energy that one can observe in everyday life.energy that one can observe in everyday life.
Mechanical Energy (including kinetic energy and Mechanical Energy (including kinetic energy and
potential energy)potential energy)
Chemical EnergyChemical Energy
Electrical EnergyElectrical Energy
Thermal Energy or Heat EnergyThermal Energy or Heat Energy
Sound EnergySound Energy
Light Energy or Radiant EnergyLight Energy or Radiant Energy
Nuclear EnergyNuclear Energy
Solar EnergySolar Energy

17. Here are some examples of energy Here are some examples of energy
transformation in daily lifetransformation in daily life..
Energy Transformation Examples

18. An electric fan, blender, and washing machine
consist of an electric motor that converts electrical
energy into kinetic energy
Electric iron, toaster, and stove convert electrical
energy into thermal energy
An electric generator converts mechanical energy
into electrical energy
A television converts electrical energy into sound
energy and light energy
A light bulb converts electrical energy into thermal
energy and light energy
A hairdryer converts electrical energy into thermal
energy and sound energy
A campfire burns wood and converts chemical
energy into thermal energy and light energy

19. The sun transforms nuclear energy into light energy
and thermal energy
Lightning converts electrical energy into light energy,
heat energy, and sound energy
Rubbing hands together converts kinetic energy into
thermal energy
Flashlight converts electrical energy into light energy
An object speeds up when it falls. Its potential
energy is converted into kinetic energy
A hydroelectric dam converts gravitational potential
energy into electrical energy
The human body digests food and converts chemical
energy into mechanical energy enabling muscles to
perform work

20. Automobiles use fuel and convert chemical energy
into mechanical energy
A bicycle dynamo converts mechanical energy into
electrical energy
A firecracker transforms chemical potential energy
into sound energy and light energy
A thermoelectric generator is a device that converts
thermal energy into electrical energy
Radio transforms electrical energy into sound energy
The kinetic energy carried by the wind rotates a
windmill to produce electrical energy
An electrolytic cell converts electrical energy into
chemical energy, whereas a voltaic or galvanic cell
converts chemical energy into electrical energy

22. Basic types of energy Basic types of energy
Kinetic EnergyKinetic Energy: the energy of : the energy of
motionmotion
Potential EnergyPotential Energy: stored : stored
energyenergy
Consider a spring as an example. When it is
compressed or extended, the spring stores elastic
potential energy. When released, the spring
oscillates, and the potential energy is converted into
kinetic energy.

23. A Roller CoasterA Roller Coaster
A roller coaster speeds A roller coaster speeds
along its track. It has along its track. It has
kinetic energykinetic energy because it is because it is
movingmoving. .

24. A Roller CoasterA Roller Coaster
As it slows to a stop at As it slows to a stop at
the top of a hill, it has the top of a hill, it has
potential energypotential energy because of because of
wherewhere it is. It has the it is. It has the
potential to move because it potential to move because it
is above the ground and has is above the ground and has
somewhere to go.somewhere to go.

26. Right, mechanical.Right, mechanical.
What if the cars What if the cars
crashed and burned? crashed and burned?
What type would it be?What type would it be?

27. Right, heat.Right, heat.

28. Substances like wood, coal, Substances like wood, coal,
oil, and gasoline have oil, and gasoline have storedstored
energy energy because of their because of their
chemistry – they can chemistry – they can burnburn
Stored energy Stored energy isis potential potential
energyenergy

29. Potential EnergyPotential Energy can be can be
changed into changed into Kinetic EnergyKinetic Energy
Also Also Kinetic EnergyKinetic Energy can be can be
changed into changed into Potential Potential
EnergyEnergy