Types of Energy - Zinszer Physicszinszerphysics.weebly.com/uploads/1/3/4/1/13414572/... ·...
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Types of Energy
By Laura Zinszer Columbia Public Schools & Physics First
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This PPT is going to describe many different types of energy.
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Energy can be divided into two groups, Potential Energy
(Stored Energy) or Kinetic Energy (Moving
Energy). 3
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There are 3 main types of Stored or
Potential Energy we will consider in our physics
class…
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1. Gravitational Potential Energy (Eg)
Eg is the energy that is stored in object due to its height or position above the ground.
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Gravitational Potential Energy (Eg)
The ball has 100% stored Egat it’s highestpoint before it starts to fall..
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Gravitational PE
Eg is the stored
energy of the kids & sled as they sit at the top of the hill ready to go down.
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The second type of stored
energy is elastic potential
energy. 8
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Elastic Potential Energy (EEL)
Elastic energy is stored energy
when an object is stretched or
compressed. This could be
rubber bands, springs, or elastic
materials. 9
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3) Chemical Potential Energy ECH
Chemical Energy is the 3rd
form of stored potential energy. It occurs when a chemical substance undergoes a change in its molecular structure.
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Examples of Chemical potential energy
include…
Candle Wax Batteries
Food
Glow Sticks
Chemicals 11
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B. Energy in Motion is called
Kinetic Energy Ek
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1) Kinetic Energy (Ek) Moving objects all have Kinetic Energy. The walking girl, running dog, bowling ball all are moving, so all have kinetic energy.
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Sometimes
Kinetic Energy Ek occurs in the motion of molecules.
The movement is too small to see, but it is still
Kinetic Energy EK.14
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2) Thermal Energy (Eth)
Thermal energy is a type of kinetic energy. It results from the movement of molecules which causes a temperature change in the object.
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Thermal Energy (ETh)The flame from a
lamp or the friction force between 2 surfaces will create thermal energy.
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3) Electrical Energy (EE)Electrical Energy is a
form of kinetic energy because it results from the
movement of electrons in an atom.
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Electrical Energy (EE)We can’t see the
electrical energy in circuits…but we can
observe Electrical Energy that occurs as static electricity
in lightning!18
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4) Radiant Energy (E rad)
Light energy is also called Radiant Energy.
It is the motion of photons of light
through space in the form of waves. It is also
known as Electro-magnetic Energy
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Reflection: In your notebook, write 3 ideas. Please identify something that surprised you, something interesting, and something you didn’t already know about types of energy.
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