energy laws & types. energy: the ability to do work or cause change

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

Batteries

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

oKinetic energy is energy of

motion.

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