5.1Forms of Energy (249-253)
Videos Introduction to Rube Goldberg Ever.flv Energy and Energy Transformations Wile E. Coyote and Roadrunner 3:11 Study Jams matter and energy
Energy Energy is the ability to cause change You use energy when you: hit a softball lift your book bag set off fireworks Eat
States of Energy Potential Energy stored energy the object is not moving Kinetic Energy energy of motion the object is moving
Forms of Potential Energy Gravitational Potential Energy (GPE) Elastic Potential Energy (EPE) Chemical Potential Energy (CPE)
Gravitational Potential Energy The height and weight of an object determine it’s GPE.
Compare the GPE of Book A to Book B Book B, because it has greater weight Compare the GPE of Book A to Book C Book A, because it is at a greater height Which of the 3 books has the greatest GPE? Book B, because it has the greatest weight and height
Elastic Potential Energy Energy that is stored due to the object being stretched or compressed
Chemical Potential Energy Some substances, such as food and fuel are made of atoms joined together in chemical bonds CPE is stored in the chemical bonds of atoms
Kinetic Energy Kinetic energy depends on both the mass and speed of the object The faster the speed ,the more kinetic energy. The greater the mass of a moving object, the more kinetic energy it has. (pg. 250)
Forms of Kinetic Energy Mechanical Thermal Sound Electric Radiant/Light Nuclear
Mechanical Energy The sum of the potential energy and kinetic energy due to the motion and interactions of objects
Thermal (Heat)Energy The sum of potential and kinetic energy of the small atomic particles that make up an object Thermal energy moves from warmer objects to cooler objects
Sound Energy Sound is caused by vibrations carried through the air in by sound waves Sound can not travel in a vacuum such as space
Electric Energy The energy an electric current carries to another object
Radiant (Light)Energy Energy carried by electromagnetic waves The Sun, visible light, x-rays, and microwaves are all examples of radiant energy
Nuclear Energy Stored in the nucleus of an atom Nuclear energy is the most concentrated form of energy. It is released under controlled conditions by splitting the nucleus of an atom
Energy ,Force, and Work Energy is the ability to cause change and is measured Joules (J) Force is a push or pull on an object and is measured in Newtons (N)
Work is the transfer of energy when a force is applied and it moves an object in the direction of the force
Work is measured in the Joules (J) Work = force x distance 10N x 2m = 20J of Work