Transcript Potential and Kinetic Energy

IQ
4/24/14
• Define energy in your own words.
• List all of the forms of energy that you
could find within this room
ENERGY
• Energy: is the ability
to do work
• Work is being done
whenever some
physical force is
being used to move
an object some
distance
Energy
• All objects contain energy in one form or another
• Can take the form of
–
–
–
–
Motion
Position
Heat
Light
-Sound
- Electricity
• It can never be destroyed
• It can only be converted from one form to
another
Kinetic Energy
= the energy an object possesses
because of its motion
• The amount of Kinetic energy is dependent on
the mass of the object in motion and it’s
velocity.
Potential Energy
• The energy of position; stored energy but not
being used
• The amount of energy contained in an object
at rest
Examine an example of potential
energy
A flower pot with a mass of 15 kg is sitting on a
window sill 15 meters above the ground. How
much potential energy does the flower pot contain?
• PE = (mass)(gravity)(height)
• = (15 kg)(9.8 m/s2)(15 m)
• = 2205 kg • m2/s2
• = 2205 J = 2000 J
• = 2.2 x 103J
• The water at the
top has potential
energy
• When water falls
to a lower level,
the potential
energy is
converted to
kinetic energy.