Download Potential Energy

Chapter 5
Section 1
Every change that occurs requires energy.
 Energy is the ability to do work.
 All moving objects have energy
 You can tell an object has energy when it:
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Changes its environment
Changes itself
Energy can be stored and moved from place to place
 Energy
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exists in many different forms
It may look different, but it’s still energy.
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Examples: electrical, chemical, radiant, and thermal
All Energy
Potential
Energy
Gravitation
Potential
Energy
Elastic
Potential
Energy
Kinetic
Energy
Chemical
Potential
Energy
 Kinetic
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energy- energy in the form of motion
Depends on mass and speed of an object
Increase in either mass or speed = increase in
energy
KE =1/2 mv2
Units = kg*m/s
The SI unit is called joule (J).
 KE
= ½ mv2 velocity changes will impact KE
more because velocity is squared.
 Shooting
band.
a rubber
 Water
falling over
the fall.
A
Yo-Yo in motion.
 Releasing
the arrow
from the bow.
 Potential
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Energy is stored energy.
Stored chemically in fuel, the nucleus of atoms,
and in foods.
Or stored because of the work done on it:
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Stretching a rubber band.
Winding a watch.
Pulling back on a bow’s arrow.
Lifting a brick high in the air.
Stretching a rubber band..
-Stores energy
Water at the top of a waterfall.
-Stores energy
Yo–Yo in held in your hand..
-Stores energy because of position
Drawing a Bow…
-Stores energy because of position
 Energy
that is stored due to being
stretched or compressed is called elastic
potential energy.
 Chemical
Potential Energy – Energy stored in
chemical bonds

Gasoline, food, hand warmers
 Gravitational
Potential Energy- Energy stored
due to position above the surface of Earth
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Gravitational Potential Energy called "GPE"
is a measure of how far an object can fall.
The higher up it is, the further it can fall and the
more GPE it has.
GPE depends on the object's
mass and height.
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GPE = m x h x a(9.8m/s ²)
 Like all other forms of energy GPE
is measured in joules.
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