SLIDE 1
What is Energy?
- “The ability to do work”
- Causes changes
- Two forms
10/4/2017 2
The ability to do work Causes changes Two forms Potential - - PowerPoint PPT Presentation
The ability to do work Causes changes Two forms Potential - - PowerPoint PPT Presentation
What is Energy? The ability to do work Causes changes Two forms Potential Kinetic POTENTIAL ENERGY KE 10/4/2017 2 The Nature of Energy Energy is ALL around you. You hear energy as sound, you see energy as light, and you
SLIDE 2
SLIDE 3
Energy is ALL around you.
The Nature of Energy
You hear energy as sound, you see energy as light, and you can feel energy in wind.
- Living organisms need energy for
growth and movement.
- You use energy when you hit a tennis ball,
compress a spring, or lift a grocery bag.
The ability to cause change What is energy?
SLIDE 4
Stored energy, energy of position- stored in motionless objects and has the potential to cause change
Potential Energy
Potential Energy - PE
https://youtu.be/ASZv3tIK56k
SLIDE 5
The energy an object or substance has because
- f its position; anything
“up high”
Perhaps the most common type of PE
Potential Energy
GPE Gravitational Potential Energy
SLIDE 6
Energy stored in an
- bject by the application
- f force which stretches,
bends or compresses.
Mechanical Stored Potential Energy Aka - Elastic Energy
Potential Energy
SLIDE 7
Nuclear Energy or aka Atomic
Energy stored in the nucleus of the atom Holds the nucleus together
Potential Energy
SLIDE 8
Chemical Energy
https://youtu.be/sinQ06YzbJI
Stored in chemicals, fuels, and explosives
Stored in the bonds between atoms. When bonds are broken, chemical energy is released. Examples:
- Gasoline, wood
- Battery
- match - before it is lit
- food
- TNT
Potential Energy
SLIDE 9
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KINETIC ENERGY KE
SLIDE 10
Movement of objects or substances from
- ne place to another
Ex:
- Water flowing in a waterfall
- Wind
- Gears in a car
https://youtu.be/PM9vnEWmA1c
Mechanical Energy (Motion)
Kinetic Energy
SLIDE 11
Electrical Energy Moving electric charge. Electrons move among atoms
Examples:
- Power lines carry electricity
- Lightning
- Shock from a door knob
Kinetic Energy
SLIDE 12
Movement of energy through substances in the form of longitudinal (compression) waves
Sound Energy
Kinetic Energy
SLIDE 13
Electromagnetic energy that travels in transverse waves Ex:
Radiant Energy
Kinetic Energy
SLIDE 14
Internal energy of a substance due to the vibration of atoms and molecules making up the substance
Thermal Energy (a.k.a. Heat)
Kinetic Energy
SLIDE 15
SLIDE 16
Can Energy Change Forms?
SLIDE 17
- Law
w of Co f Conse nservation ation of f En Energy ergy
Energy cannot be created or destroyed, but rather can only be transformed (change forms) or transferred (converted).
Energy Transfers
SLIDE 18
Energy Transfers
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- Fi
First st Law w of f Th Thermodynamics ermodynamics
Energy will always transfer from high to low. No energy transfer is 100% efficient. Some is always transferred into heat.
SLIDE 19
The farther back the bow is pulled, the more the PE.
What form of PE? What form of KE does the arrow have?
SLIDE 20
To remember most of the Forms of Energy: S C R E A M T oday!
SLIDE 21
ENERGY SONG
The ENERGY Song - Mr. Edmonds - Rock with "That's the Way - I Like It" music theme !
https://youtu.be/_uLSFigtLKg
3minutes