15.1 Energy and Its Forms

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Describe sources and common uses of different forms of
energy: chemical, nuclear, thermal, mechanical,
electromagnetic.
Relate kinetic energy to an object’s mass and its velocity.
Relate and object’s gravitational potential energy to its weight
and height relative to the surface of the Earth.
Distinguish between examples of kinetic and potential
energy.
Describe the transfer of energy that occurs as energy changes
from kinetic to potential within a system.
Compare the efficiency of systems.
Classify the different ways to store energy and describe the
transfer of energy as it changes from kinetic to potential,
while the total amount of energy remains constant.
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I can identify the major forms of energy and
give an example of each.
I can calculate the kinetic energy of an object.
I can calculate the gravitational potential
energy of an object.
I can classify examples of kinetic and
potential energy.
I can explain kinetic and potential energy
transfers in examples of roller coasters,
pendulums, and falling objects.
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Energy is the ability to move matter (do
work).
Work is the transfer of energy from one
object to another.
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

Describe sources and common uses of different forms of
energy: chemical, nuclear, thermal, mechanical,
electromagnetic.
Relate kinetic energy to an object’s mass and its velocity.
Relate and object’s gravitational potential energy to its weight
and height relative to the surface of the Earth.
Distinguish between examples of kinetic and potential
energy.
Describe the transfer of energy that occurs as energy changes
from kinetic to potential within a system.
Compare the efficiency of systems.
Classify the different ways to store energy and describe the
transfer of energy as it changes from kinetic to potential,
while the total amount of energy remains constant.





I can identify the major forms of energy and
give an example of each.
I can calculate the kinetic energy of an object.
I can calculate the gravitational potential
energy of an object.
I can classify examples of kinetic and
potential energy.
I can explain kinetic and potential energy
transfers in examples of roller coasters,
pendulums, and falling objects.
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Most types of energy can be classified into
two types: Kinetic and Potential.
Kinetic energy is energy of motion.
Kinetic energy depends on the:
◦ Mass of the object.
◦ Velocity of the object.
KE = ½ mv2
1) Find the kinetic energy of a bullet with a
mass of 0.03 kg and a velocity of 400 m/s.
Given:
Work:
Formula:
Answer:
Potential energy
is the energy that
is stored in a
object due to its
condition or
position.
 Most PE is
caused by gravity
and is called
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gravitational
potential energy.
Gravitational Potential Energy is stored
energy due to gravity.
 Depends on three things:
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1. Gravity
2. Mass
3. Height
PE = mgh
1) What is the potential energy of a 0.5 kilogram
apple that is 5 meters from the ground?
Given:
Work:
Formula:
Answer:
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Questions, Comments,
Concerns???
Class Work:
◦ KE and PE Practice Problems
Summary Questions
1) What three things
determine the
gravitational potential
energy of an object?
2) What does “g” always
equal?








Describe sources and common uses of different forms of
energy: chemical, nuclear, thermal, mechanical,
electromagnetic.
Relate kinetic energy to an object’s mass and its velocity.
Relate and object’s gravitational potential energy to its weight
and height relative to the surface of the Earth.
Distinguish between examples of kinetic and potential
energy.
Describe the transfer of energy that occurs as energy changes
from kinetic to potential within a system.
Compare the efficiency of systems.
Classify the different ways to store energy and describe the
transfer of energy as it changes from kinetic to potential,
while the total amount of energy remains constant.
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Roller Coaster Physics Article and Animation
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Elastic Potential Energy is energy stored in an
object that will return to its original shape.
Hyperlink
1. Mechanical energy is the sum of an objects
kinetic and potential energy.
2. Thermal energy is the energy contained in
the motion of the particles of matter.
3. Chemical energy is the energy contained
within the chemical bonds of matter.
4. Electrical energy is energy associated with
electric charges (moving electrons).
5. Electromagnetic energy (light) is a form of
energy that travels in electromagnetic waves.
6. Nuclear energy is energy contained within the
nuclei of atoms.
7. Sound energy is energy that travels as
waves through matter.
8. Magnetic energy is the energy contained
within magnets.
1)
2)
3)
4)
5)
6)
What is work?
What is the difference between kinetic
energy and potential energy?
What is the formula for KE?
What is the formula for PE?
Name and describe the two types of
potential energy.
As a group, name the eight forms of energy.
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Roller Coaster Physics Article and Animation
Summary:
Other than potential or kinetic energy, what is
one type of energy and give an example (you
cannot use an example from this class –
that’s called cheating – come up with your
own).







Describe sources and common uses of different forms of
energy: chemical, nuclear, thermal, mechanical,
electromagnetic.
Relate kinetic energy to an object’s mass and its velocity.
Relate and object’s gravitational potential energy to its weight
and height relative to the surface of the Earth.
Distinguish between examples of kinetic and potential
energy.
Describe the transfer of energy that occurs as energy changes
from kinetic to potential within a system.
Compare the efficiency of systems.
Classify the different ways to store energy and describe the
transfer of energy as it changes from kinetic to potential,
while the total amount of energy remains constant.
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