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TAKE NOTES!
KEY TERMS
•
An energy transformation occurs when
energy changes from one form to
another.
•
Energy transformations occur in energy
production (as in conversions of energy
for use in everyday life).
•
Potential Energy is the energy that is
stored because of an object’s position.
•
The energy of an object due to its
motion is called Kinetic Energy.
Energy is the ability to cause change
 An
exertion of force
 The ability to do work
 Potential(stored) and Kinetic(motion) a
separate division of each type of energy
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Energy an object
has because of its
position
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Energy of motion. Only a
moving object has kinetic
energy
Amount of energy depends
on speed and mass
EXAMPLE 1
POSITION 1
Potential Energy
The boulder at the
top of the hill has
potential energy
and no kinetic
energy.
POSITION 2
Kinetic Energy
Potential Energy
As the boulder rolls
down the hill, the
potential energy
transforms into kinetic
energy and kinetic
energy becomes
greater until
POSITION 3
The boulder is in a
resting position with
low potential energy
and no kinetic
energy.
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Energy vs. Matter
everything on Earth is either energy or matter
 Energy has no mass or
weight
 Energy does not take up
space
 Energy is NOT
matter
• Matter has mass
and weight
• Matter takes up
space
• Matter is NOT
energy
CONSERVATION of ENERGY – energy can not be
created or destroyed
R
E
C
T
M
N
Radiant – infrared/absorbed
Electrical - power
Chemical - chemicals
Thermal - heat
Mechanical – motion
Nuclear – atoms nuclei
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is the amount of energy transferred
by a force acting through a distance.
Work=Force x Distance (W=F x d)
Joule(J)- unit used to measure work
1 J= amount of work done moving a
force of 1 Newton a distance of 1
meter
1J=1 N/M

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 Make
work EASIER to accomplish (but
amount is the same)
 Change magnitude of force required to
accomplish task
 Change direction of force required to
accomplish task
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 Decrease
the amount of work
necessary to accomplish a given task
 Have
 Run
100% efficiency
perpetually