Potential and Kinetic EnergyPotential and Kinetic Energy

How is all energy divided?How is all energy divided?

PotentialEnergy

KineticEnergy

All Energy

GravitationPotentialEnergy

ElasticPotentialEnergy

ChemicalPotentialEnergy

What is Potential Energy?What is Potential Energy?

o Energy that is Energy that is stored and waiting stored and waiting to be used laterto be used later

What is Gravitational Potential What is Gravitational Potential Energy?Energy?

o Potential energy Potential energy due to an object’s due to an object’s positionposition

o P.E. = mass xP.E. = mass x height x height x

gravitygravity

Don’t look down, Rover!

Good boy!

What is Elastic Potential What is Elastic Potential Energy?Energy?

o Potential energy due compression Potential energy due compression or expansion of an elastic object.or expansion of an elastic object.

Notice the ball compressingand expanding

What is Chemical Potential What is Chemical Potential Energy?Energy?

o Potential energy Potential energy stored within the stored within the chemical bonds chemical bonds of an objectof an object

What is Kinetic Energy?What is Kinetic Energy?

o Energy an object has Energy an object has due to its motiondue to its motion

o K.E. = 1/2mvK.E. = 1/2mv22

Kinetic Energy Depends Kinetic Energy Depends on 2 factorson 2 factors

Mass and VelocityMass and Velocity

If the trucks have the same mass, which one has greater KE?

If Dino and the car have the same velocity, which has the greater KE?

Which factor has the Which factor has the greater impact on KE?greater impact on KE?

Think about the formula!!Think about the formula!!

Velocity has greater influence because it is

SQUARED in the formula!!

Energy is Conserved!Energy is Conserved!

The total amt of energy The total amt of energy remains constant!!remains constant!!

KE i + PE i = KE f + PE f

Mechanical EnergyMechanical Energy

The total amount of KE and PE is The total amount of KE and PE is referred to as the total MECHANICAL referred to as the total MECHANICAL ENERGY of an object.ENERGY of an object.

TME = KE + PETME = KE + PE

There are other forms of There are other forms of energy.energy.