Energy Chapter 4.

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Presentation transcript:

Energy Chapter 4

The Nature of Energy Any kind of change required energy Light heating up Breathing Writing Air movement

Energy List examples of energy in motion Two ways to transfer energy Waves particles

The ability to cause a change Many forms Radiant Electrical Chemical Thermal nuclear

Analogy Definition Examples with energy

Basic Unit Joule, J Named after James Prescott Joule Did experiments to explain heat

Kinetic Energy Energy of motion Depends on two factors mass velocity

Equation Kinetic energy = ½ mass x velocity squared KE = ½ mv2

Potential Energy Stored energy or energy of position Elastic Potential Chemical Potential Energy Gravitational Potential Energy

Gravitational Potential Energy Depends upon three variables mass gravity height

Equation Potential energy = mass x gravity x height PE = mgh