Forces in Nature

1. Forces in Nature

2. Kinetic Energy • Energy of motion. • Examples • Wind • Moving Rollercoaster • Rolling Ball • Speeding train • Now you list 3 other examples of Kinetic Energy on your note page

3. Potential Energy • Stored Energy in an object • Examples of Potential energy • Rock at the top of a ledge • Ball sitting on the ground in a soccer field • Swing at the top of its arch. • Now you list 3 other examples of Potential Energy on your Note Page

4. Which picture shows potential energy?

5. Where is the potential energy and where is the kinetic energy located in the picture below?

6. Forms of Energy • Electrical • Mechanical • Chemical As well as… • Gravitational • Light • Heat We will only be looking at the first three today.

7. Electrical • The flow of charged particles called ions. (wonder where we have heard that before) • When electrons are flowing through a wire, they are being forced through the electrical field

8. Mechanical • refer to things like gears, engines, locomotives pulling trains, canon balls flying through the air, or other examples of energy in mechanical devices

9. Chemical • refers to energy that is stored in molecular bonds, the forces that hold molecules together. • So releasing chemical energy must mean the energy is finally free from its molecular bonds. • Chemical energy is stored (potential) energy until the bonds are broken.

10. Forces in Nature • Plants growing? • How do plants growing exhibit forms of energy and the forces of physics?

11. Energy of a Plant • How does a plant using energy to grow? • The plant uses the chemical energy stored in its molecular bonds (chemical bonds) to grow. • The plant uses energy from the environment to help in breaking the bonds of the chemical compounds stored in the plant (photosynthesis).

12. Physics of Plant Growth • How does a plant use physics to force its way to the surface of the earth? • www.discoveryeducation.com