the nature of energy

Motion, Force & Energy Chapter 5.1

Pages 140-145

• EnergyEnergy is the ability to do Work or cause a change–Measured in Joules, like Work

• Kinetic Energy is Kinetic Energy is the energy of the energy of motionmotion

• All moving objects have Kinetic Energy (KE )

• What determines an object’s KE?– MassMass & VelocityVelocity

determine the KE of an object.

• Potential EnergyPotential Energy (PE ) is stored energyis stored energy– It has the potential or

“possibility” to do work

• Gravitational PEGravitational PE is energy that depends on height

• Elastic PEElastic PE is for objects that can be stretched.

Mechanical EnergyMechanical Energy• Energy associated with Energy associated with

motion (KE & PE)motion (KE & PE)

Thermal Thermal EnergyEnergy• Energy of particles in an objectEnergy of particles in an object

Chemical EnergyChemical Energy• Energy stored in chemical bondsEnergy stored in chemical bonds

Electrical EnergyElectrical Energy•Moving electric chargesMoving electric charges

Electromagnetic EnergyElectromagnetic Energy•Waves of energy, such as lightWaves of energy, such as light

Nuclear EnergyNuclear Energy•The fusion or fission of The fusion or fission of atomsatoms

Which of the following is an example of Kinetic EnergyKinetic Energy?

A bow string that is pulled back and ready to fire is…

What is the difference between KineticKinetic and PotentialPotential energy?

Give an exampleexample of each.