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WHAT IS ENERGY?
• “THE ABILITY TO DO WORK”
•THE COMBINATION OF ENERGY AND MATTER MAKE UP THE UNIVERSE:
• MATTER IS SUBSTANCE, AND ENERGY IS THE MOVER OF
SUBSTANCE.
THE LAW OF CONSERVATION OF ENERGY
•ENERGY CANNOT BE CREATED OR DESTROYED
• IT MAY BE TRANSFORMED FROM ONE FORM INTO ANOTHER,
• TOTAL AMOUNT OF ENERGY NEVER CHANGES.
TYPES OF ENERGY• THERE ARE MANY
TYPES OF ENERGY
INCLUDING:
• KINETIC & POTENTIAL• HEAT• LIGHT• SOUND• ELECTRICAL• CHEMICAL• NUCLEAR• MAGNETIC• MECHANICAL
WHAT IS THE SOURCE OF OUR ENERGY?
•THE SOURCE OF PRACTICALLY
ALL OUR
ENERGY IS THE
SUN.
HOW IS ALL ENERGY DIVIDED?
PotentialEnergy
KineticEnergy
All Energy
GravitationPotentialEnergy
ElasticPotentialEnergy
ChemicalPotentialEnergy
WHAT IS POTENTIAL ENERGY?
oENERGY THAT IS STORED AND WAITING TO BE
USED LATER
WHAT IS CHEMICAL POTENTIAL ENERGY?
o POTENTIAL ENERGY STORED WITHIN THE
CHEMICAL BONDS OF AN
OBJECT
Elastic Potential Energy
Stretchy item stores elastic potential energy when stretched or squashed
WHAT IS GRAVITATIONAL POTENTIAL
ENERGY?
o POTENTIAL ENERGY DUE TO AN OBJECT’S
POSITION
POTENTIAL ENERGY (PE) = MGH
•M = MASS (KG)
•G = ACCEL DUE TO GRAVITY
•(9.8 M/S2)
•H = HEIGHT (M)
PE Calculation
What is the PE of an object that weighs _____kg and is at a height of ____meters?
PE = m * g * h
m =
g =
h =
WHAT IS KINETIC ENERGY?
o ENERGY AN OBJECT HAS DUE TO ITS MOTION
KE Calculations
What is the KE of a ____kg roller coaster car that is moving with a speed of _____ m/s.?
KE = ½ * m * v2
m =
v2=
ENERGY CONVERSION
•ANY TYPE OF
ENERGY
CAN BE
CHANGED
INTO ANY
OTHER
TYPE OF
ENERGY
QUIZ TIME!
WHAT ENERGY TRANSFORMATION
OCCURS WHEN AN ELECTRIC
LAMP IS TURNED ON?
ELECTRICAL ENERGY
↓ELECTROMAGNETIC ENERGY
WHAT TYPE OF ENERGY IS SHOWN BELOW?
CHEMICAL ENERGY
WHAT TYPES OF ENERGY ARE SHOWN BELOW?
ELECTRICAL, MECHANICAL AND
ELECTROMAGNETIC ENERGY
WHAT TYPE OF ENERGY IS SHOWN BELOW?
CHEMICAL ENERGY (YUMMY)
WHAT TYPE OF ENERGY IS SHOWN BELOW?
THERMAL ENERGY
WHAT TYPES OF ENERGY ARE SHOWN BELOW?
MECHANICAL, ELECTROMAGNETIC,
ELECTRICAL, CHEMICAL AND THERMAL
ENERGY