Download Energy - isd194 cms .demo. ties .k12. mn .us

Energy
Energy Conversions
Energy Conversion
• A change from one form of energy
to another.
Qui ckTime™ and a
TIFF (U ncompr essed) decompressor
are needed to see thi s pi cture.
Example
• Pendulum - Starts as
potential energy, as it
swings downwards it
changes to kinetic
energy, when it hits its
lowest point it goes
back to potential
energy, as it swings
upwards it is kinetic
energy and when it hits
its highest point again it
turns into potential
energy.
QuickTime™ and a
TIF F (Uncompressed) decompressor
are needed to see this picture.
Example #2
QuickTime™ and a
TIFF (Uncompress ed) dec ompres sor
are needed to s ee this pic ture.
• Rubber band - Starts
as potential energy
until you stretch it, it
turns into kinetic
energy. When you
have stretched to its
maximum elasticity it
turns back into
potential energy and
when you let go it turns
back into kinetic
energy.
Example #3
• Soccer ball - When the
ball is resting on the
ground it has potential
energy. When a player
kicks the ball the
potential energy is
turned into kinetic
energy. As the ball
rolls it slows down and
eventually stops
returning to a state of
potential energy.
QuickTi me™ and a
TIFF ( Uncompressed) decompressor
are needed to see thi s pi ctur e.
Example #4
• Running:
Quic k Ti me™ and a
T IFF (Unc om pres s ed) dec om pres s or
are needed to s ee t his pic t ure.
Sun (light) --- tree
(chemical) --- fruit
(chemical) --- person
eating fruit (chemical) -- person running
(mechanical)
Example #5
• Hair dryer:
Electrical outlet
(electromagnetic) -- hair dryer (sound,
thermal, light)
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
Example #6
• Light Bulb:
QuickTi me™ and a
T IFF (Uncom pressed) decom pressor
are needed to see t his pict ure.
Electrical wiring
(electromagnetic) -- light bulb (light,
thermal)
Example #7
• Golf Player:
Stored lunch
(mechanical:
potential) --- swinging
the club (mechanical:
kinetic) --- ball flying
(mechanical: kinetic,
sound)
QuickT ime ™an d a
TIFF ( Uncomp res sed) deco mpre ssor
ar e need ed to see this pictur e.
Law of Conservation of
Energy
• Energy cannot be created nor
destroyed.
• It can be transferred from one object to
another.