energy laws & types. energy: the ability to do work or cause change
Post on 01-Apr-2015
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Energy Laws & Types
• Energy: the ability to do
work or cause change
•Energy is always involved when
physical or chemical changes occur in
matter
•You can detect the effects of energy when matter is moved, when
it reacts, or when energy is transformed
from one form to another form
Law of Conservation of Energy:
Energy cannot be created or destroyed, it can only
change from one form to another
•2 Main Types of Energy:
Potential or
Kinetic
oPotential energy is stored energy that has not been used.
Examples Potential Energy
Food
Gasoline (fuel)
Pulled back Bow and Arrow
Rollercoaster at top of hill
Do you have more
examples of potential energy?
•An object has potential energy
because of its position, shape, or
chemistry
•An object’s potential energy is increasing as it gets higher
•The more mass an object has the
more potential energy it has
Examples Kinetic Energy
Swinging a Hammer
Throwing a Ball
Running
Weather
Bowling
Do you have more
examples of kinetic
energy?
•The amount of kinetic energy an
object has depends on its mass and
speed
•The faster the object goes, the
more kinetic energy the object
has
•An object with a larger mass will
have more kinetic energy than a
smaller object at the same height
•As the potential energy increases, the kinetic energy
decreases
•As the potential energy decreases, the kinetic energy
increases
Examples both
Potential and Kinetic energy
Pendulum
Trampoline
Avalanche
Waterfall
http://www.teachersdomain.org/asset/mck05_int_rollercoaster/
http://phet.colorado.edu/en/simulation/energy-skate-park-basics
Energy Skate Park
What is the relationship of potential and
kinetic energy?
Potential and kinetic energy are inversely proportional
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