Introduction to Energy

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Presentation transcript:

Introduction to Energy

Interpret the relationship between potential and kinetic energy. SPI.0607.10.1 Distinguish among gravitational potential energy, elastic potential energy, and chemical potential energy. SPI.0607.10.2 Interpret the relationship between potential and kinetic energy.

What is Energy? Energy is the ability to do work. Work is the transfer of energy. Work occurs when a force causes an object to move in the direction of the force.

What is Energy? What is the relationship between work and energy? (Discuss with your neighbor. You can not have one with out the other

What are the Two Types of Energy? Kinetic Energy is the energy of motion. Potential Energy is the energy of shape or position (stored energy.)

Examples of Kinetic Energy Cheetah Running Dolphins Jumping

Examples of Potential Energy Elastic Potential Gravitational Potential

What is Mechanical Energy? Mechanical energy is the total energy of motion and position of an object. Mechanical energy = Kinetic energy + Potential energy

Examples of Mechanical Energy Weight Lifting Running Engine

Forms of Potential and Kinetic Energy

Elastic Potential energy - energy stored in stretched out items Elastic Potential energy - energy stored in stretched out items. After the item is stretched it returns to its original position or shape. Ex: bow strings, rubber bands

Gravitational Potential Energy - energy given to an object after it has been lifted or elevated Ex: book on a shelf

Examples of Potential Energy Elastic Potential Gravitational Potential

Chemical Energy Energy released from chemical reactions Example: a battery Chemical energy is a form of potential energy!!

Thermal Energy Total energy of particles that make up an object; heat energy Example: the sun Also known as radiant energy

Electrical Energy Energy of moving electrons Example: hair dryer

Light Energy Caused by the vibrations of electrically charged particles Example: light bulb

Sound Energy Caused by an object’s vibration Example: radio

Nuclear Energy The energy associated with changes in the nucleus of an atom Example: nuclear power plant

Nuclear Energy Everything is made up of atoms! They are made of protons, neutrons and electrons.

Nuclear Energy In order to create nuclear power an atom must either be split in two or joined with another atom. This is not a process that is easily done. It requires a lot of work and highly qualified persons – as well as advanced technology.