On your vocab sheets, relate work to potential and kinetic energy On your vocab sheets, relate work to potential and kinetic energy. 2-3 minutes
What is Energy? Let’s find out.
What is Energy? The ability to do work or cause change.
What are the different forms of Energy?
What are the different forms of Energy? Energy has a number of different forms, all of which measure the ability of an object to do work on or change another object. In other words, there are different ways that an object can possess energy.
What are the different forms of Energy? Mechanical Energy Kinetic Energy Potential Energy Thermal, or heat energy Chemical Energy Electrical Energy Electromagnetic Energy (light) Sound Energy Nuclear Energy
Energy can be divided into two general categories: Potential Kinetic
Potential Energy
Definition of Potential Energy Potential energy is energy due to position or stored energy. Potential energy is also called gravitational potential energy.
Potential Energy Stored energy Energy of position The amount of usable energy in a body at rest Sometimes called GRAVITATIONAL POTENTIAL ENERGY Can be calculated mathematically PE = weight X height
Give an example of potential energy
Give an example of potential energy By stretching a rubber band, you give it potential energy. A vase on a shelf has stored potential energy. A football being held by a quarterback has potential energy until it is thrown and it turns into kinetic energy.
Potential energy can be increased by: Increasing height Increasing mass
Kinetic Energy
Definition of Kinetic Energy Kinetic energy is the energy of motion. Kinetic energy is measured by how much work is done to put an object in motion or to rest.
Kinetic Energy Energy of motion Energy an object has because it is moving Can be calculated mathematically KE = (mass x velocity²)÷2 or ½ mv²
Give an example of kinetic energy
Give an example of kinetic energy A basketball player has kinetic energy. The movements that she does show the energy that is being displayed while she is moving. When you are running, walking, or jumping, your body is exhibiting kinetic energy.
Kinetic Energy can be increased by: Increasing mass Increasing velocity
Give an example of something that has both potential and kinetic energy.
Give an example of something that has both potential and kinetic energy. A waterfall has both kinetic and potential energy. The water at the top of the waterfall has stored potential energy. Once the water leaves the top of the waterfall, the potential energy is changed into kinetic energy.
Click this link for more information about potential & kinetic energy Click this link for more information about potential & kinetic energy. Remember to hit the “back” button on your browser to return to this slide show. http://www.usoe.k12.ut.us/curr/science/sciber00/8th/forces/sciber/potkin.htm
Conservation of Energy
Law of the Conservation of Energy Energy cannot be created or destroyed; it can only be changed from one form of energy to another form. The amount of energy stays the same.
Describe Conservation of Energy Click here for more examples of Conservation of Energy: http://web.singnet.com.sg/~stepchin/Conserv.htm Remember to hit the “back” button on your browser to return to this slide show.