Submitted by, Sheeba S,

Physical Science,Christ Nagar College of Education,

Thiruvallam

Potential Energy & Kinetic Energy

What is ENERGY?

• Energy is the ability to do work.• Everything that happens in the world uses energy!• Most of the time we can’t see energy, but it is

everywhere around us!

Energy…

• can NEVER be created nor be destroyed!

• can only be STORED or TRANSFERRED.

Batteries store energy!

This car uses a lot of energy

We get our energy from FOOD!

Even this sleeping puppy is using stored energy.

Remember:

ALL matter is made up of particles. The particles NEVER stop moving.

How is all energy divided?

KineticEnergy

All Energy

PotentialEnergy

GravitationalPotentialEnergy

ElasticPotentialEnergy

ChemicalPotentialEnergy

Potential Energy is…

• The energy stored in an object.

• "Potential" simply means the energy that has the ability to do something useful later on.

What is Gravitational Potential Energy?

o Potential energy due to an object’s position

o P.E. = mass x height x

gravity

Don’t look down, Rover!

Good boy!

What is Elastic Potential Energy?

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

Notice the ball compressingand expanding

What is Chemical Potential Energy?

o Potential energy stored within the chemical bonds of an object

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Kinetic Energy is…• The energy of a moving object.

• "Kinetic" means movement!

• When stored energy is being used up, it is making things move or happen.

Examples of Kinetic Energy