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Conservation of energy!

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Presentation on theme: "Conservation of energy!"— Presentation transcript:

1 Conservation of energy!
Ch. 5 Section 2 Conservation of energy!

2 THINK ABOUT IT… Energy is CONSTANTLY being transferred all of the time! When you turn on a light, the electrical energy turns into LIGHT energy, which can then be transferred as HEAT energy!

3 Also… Potential energy is constantly being transferred into kinetic energy *Think about when you use a bow and arrow or when a roller coaster is at the top of a hill and suddenly starts moving…potential energy gets transferred into kinetic energy!

4 Mechanical energy Mechanical energy = the total amount of potential and kinetic energy in a system that can be expressed by the following equation Mechanical energy = Potential energy+ Kinetic energy *Mechanical energy is energy due to the position and the motion of an object or the objects

5 Law of conservation of energy
States that energy can never be created or destroyed (only transferred) *What this means is that (on a large scale) the amount of total energy in the universe does not change…

6 Example…a hair dryer!!! You may have heard that it’s important to conserve energy. What this means is it’s important to lower the consumption of energy sources like, electricity/ fuel oil/ natural gas/ etc. The Law of Conservation of Energy is only stating that energy in= energy out

7 A hair dryer for example, consumes electrical energy and transfers it into thermal energy, sound energy and kinetic energy!

8 Talk and share out! With your table, come up with 2 instances where energy is being used. Explain where the energy comes from and where it gets transferred to! (Hair dryer example is already taken)! 3-4 minutes!

9 http://www.livescience.com/16951- einstein-physics-ghosts-proof.html
Think and discuss einstein-physics-ghosts-proof.html

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