Download Law of Conservation of Energy

THINK ABOUT IT…
Energy is CONSTANTLY being
transferred all of the time! When
you turn on a light, the electrical
energy turns into LIGHT energy,
which can then be transferred
as HEAT energy!
ALSO…
Potential energy is constantly being transferred
into kinetic energy
*Think about when you use a bow and arrow or
when a roller coaster is at the top of a hill and
suddenly starts moving…potential energy gets
transferred into kinetic energy!
MECHANICAL ENERGY
Mechanical energy = the total amount of
potential and kinetic energy in a system that
can be expressed by the following equation
Mechanical energy = Potential energy+ Kinetic
energy
*Mechanical energy is energy due to the
position and the motion of an object or the
objects
LAW OF CONSERVATION OF ENERGY
States that energy can never be created or
destroyed (only transferred)
*What this means is that (on a large scale) the
amount of total energy in the universe does
not change…
EXAMPLE…A HAIR DRYER!!!
You may have heard that it’s important to conserve
energy.
What this means is it’s important to lower the
consumption of energy sources like, electricity/ fuel
oil/ natural gas/ etc.
The Law of Conservation of Energy is only stating that
energy in= energy out
A hair dryer for example, consumes
electrical energy and transfers it into
thermal energy, sound energy and
kinetic energy!
TALK AND SHARE OUT!
With your table, come up with 2
instances where energy is being
used. Explain where the energy
comes from and where it gets
transferred to! (Hair dryer example
is already taken)!
3-4 minutes!
THINK AND DISCUSS
http://www.livescience.com/16951einstein-physics-ghosts-proof.html