EnergyEnergyEnergyEnergyTypes of Energy

Potential energyKinetic energy

The ability to do workShown by:

– Application of force

– Movement of something by that force.

ForceForceForceForcePush or pull• More acceleration = _____ force

• More mass = _____ force

F = ma

more

more

Force = mass X acceleration

EnergyEnergyEnergyEnergy

Work = force x distance

(W = F x d)

Measured in Joules: –N (unit of force) combined with

with M (unit of distance).

Potential Energy

Potential Energy

Stored energy:–Energy that can be burned ____

–Chemical energy stored in _______

–Energy stored in food as ______

–Energy from height above the earth’s surface ________________

fuel

a battery

sugars

gravitational energy

Gravitational Gravitational EnergyEnergy

Gravitational Gravitational EnergyEnergy

• Due to the attractive gravitational force between all objects in the universe

• Near Earth’s surface the force due to gravity is 9.8 m/s/s

Gravitational Gravitational EnergyEnergy

Gravitational Gravitational EnergyEnergy

W = F x dgPE = mgh

m = mass of the objectg = gravitational force

9.8 m/s/sh = height above the

surface of the earth

Kinetic EnergyKinetic EnergyKinetic EnergyKinetic Energy

Energy due to motion depends on:– _____ of the object

– ______ of the object

massspeed

More connected to speed than mass: KE = ½ mv2

m = mass v = speed

Conservation of Conservation of EnergyEnergy

Conservation of Conservation of EnergyEnergy

• Energy can’t be created or destroyed

• Can change from one form to another

• Examples:– Fuel burning makes ____

– Battery makes ____

– Use gravity to make

______

• Energy can’t be created or destroyed

• Can change from one form to another

• Examples:– Fuel burning makes ____

– Battery makes ____

– Use gravity to make

______

heatlight

motion