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