Transcript Potential and Kinetic Energy

Energy…
…is the ability to make
things move/ do work
Potential
and Kinetic
Energy
Definitions
Kinetic Energy: the energy
of motion
Potential Energy: stored
energy
The types of energy…
Potential



Chemical - gasoline,
Gravitational – Gravity
Elastic – rubber band
Kinetic






Light – flash light,
Heat – burner on a stove,
Nuclear - sun,
Mechanical - car,
Sound – music on the radio,
Electrical - lightning
What is Potential Energy?
o Energy that is stored
and waiting to be
used later
What is Gravitational Potential
Energy?
o Potential energy
due to an object’s
position
Don’t look down,
Rover!
Good boy!
o P.E. = mass x
height x gravity
What is Elastic Potential Energy?
o Potential energy due compression or
expansion of an elastic object.
Notice the ball compressing
and expanding
What is Chemical Potential Energy?
o Potential energy
stored within the
chemical bonds of
an object
What is Kinetic Energy?
o Energy an object has due
to its motion
o K.E. = .5(mass x speed2)
A Roller Coaster
A roller coaster speeds
along its track. It has
kinetic energy because it is
moving.
A Roller Coaster
As it slows to a stop at the
top of a hill, it has potential
energy because of where it
is. It has the potential to
move because it is above the
ground and has somewhere to
go.
LAW OF
CONSERVATION
OF ENERGY
Energy can not
be created or
destroyed only
transferred!!!!