1. Energy POTENTIAL AND KINETIC

2. Objectives  Explain the concepts of kinetic and potential energy.  Understand that energy can change from one form into another.  Law of conservation of energy

3. Energy 3 different items: Battery Apple Jonah sitting on his stool What do all of these items have in common?

4. Energy  Battery has electrical energy (in the form of electrical, potential or stored energy), which can be used by a flashlight or a portable CD player.  The food contains chemical energy that is used by the body as fuel  Jonah sitting on a stool has potential energy (sometimes called gravitational potential energy)

5. What is energy  Defines as the ability to cause change  Types include  Electrical  Thermal  Radiant/ Light  Sound  Nuclear  chemical

6. 2 types of mechanical energy  Potential energy- stored energy. Ex- waiting at the top of a slide  Kinetic energy- energy in motion. Ex. Going down the slide  KE- depends on the mass and the velocity of the moving object

7. Potential energy Chemical PE- energy stored in chemical bonds- ex. Glass of milk has CPE- you drink it then calories are used as energy for your body ex. Photosynthesis- energy from sun into chemical energy  Elastic PE- energy stored by something that can stretch or compress  Ex.spring or rubber band

8. Gravitational PE  Anything that can fall has GPE  Ex. Jonah falling from his stool

9. Energy  Energy can be converted from one form to another.  Law of conservation of energy- energy can be transformed from one form to another, but energy cannot be crated or destroyed. (total amount of energy never changes)  Ex. Photosynthesis- Sun’s radiant energy into chemical energy  Ex. Jonah had potential energy when sitting on the stool, which completely changed into kinetic energy when he moved.