Potential and Kinetic Energy

Energy Big Question: How does energy transfer through various systems in the natural world? Learning Targets Describe and identify examples of potential and kinetic energy Describe the relationship between potential and kinetic energy

What is Energy? BrainStorm

Energy Is … the ability to cause change

How is all energy divided? Potential Energy Kinetic Energy Gravitation Potential Energy Elastic Chemical Magnetic Potential Energy

What is Potential Energy? Energy that is stored and waiting to be used later

Gravitational Potential Energy Potential energy due to an object’s position Based on mass and height P.E. = mass x height x gravity Don’t look down, Rover! Good boy! 9.8m/s 2

What is Elastic Potential Energy? How much an object has been compressed or stretched (tension) Or how difficult it is to compress or stretch Increase the compression/stretched the EPE also increases

Magnetic Potential Energy Potential energy associated with the position of magnetic objects relative to each other Opposite Poles Highest PE when near the edge of attraction Lowest PE when they pull together Like Poles Highest PE when forced together Lowest PE when they are springing apart One object is a magnet - Increase the distance, increase the potential energy

Magnetic Potential Energy

What is Chemical Potential Energy? Potential energy stored within the chemical bonds of an object

Increase the size of battery – increase chemical energy (DE)

More bonds – more Chemical energy

Anything that has chemical properties

More Calories – More Chemical Energy

Electrical Potential Energy aka Electrostatic PE Measured in Joules Based on the objects electric charge ( + / - )

What is Kinetic Energy? Energy an object has due to its motion K.E. = .5(mass x speed2)