Presentation on theme: "Conservation of Energy September 21/22"— Presentation transcript:
1Conservation of Energy September 21/22 Physical ScienceConservation of Energy September 21/22
2Notebook set up Table of Contents #. Date Title-Page – Page Number17. September 21/22 Conservation of Energy – 3112Leave 4 pages (2 sheets) for the table of contentsNumber each page in the bottom right corner
3Notebook set up Date: Daily work: IN: Objective: Success Criteria: Synthesis PictureI own this I still don’t understandthisOUT:5Daily work:6
4In:If an 500 kg object reaches the top of a 10 m hill, how much potential energy does it have? How much work will it do to go down the hill? How much power will be exerted when if it takes 5 seconds to go down the hill?
5Goals:Objective: apply the laws of thermodynamics to determine how energy is conservedSuccess Criteria:Be able to:- describe where energy is present in each form- explain how energy is conserved using quantitative data- describe why a roller coaster works using these laws
6Roller Coaster Challenge You must analyze the physics of a roller coaster from through the lens of work, power, and energy. To do this you will have to rely on your knowledge of energy to determine the best design for a roller coaster.
7BackgroundFrom your reading write a summary paragraph which will help you to answer the questions in your challenge(Be sure to include the necessary equations and explanations to determine the necessary structural designs)
8ThermodynamicsEnergy is the ability to bring about change or to do work.First Law of Thermodynamics: Energy is always conservedSecond Law of Thermodynamics : Energy flows from high to lowSecond Law of Thermodynamics : Movement decreases as energy decreases but never completely stops
9Roller Coaster Physics E = E p + EkFor the totals amountof energyE p = Ek
10Background Information When is there kinetic energy? When is there potential?What happens to velocity as the height increases? Explain this in terms of kinetic energy being changed to potential.Why must the first hill be the tallest?How does the ride slow to a stop safely? Explain in terms of kinetic and potential energy transfers (including work lost to friction)How would you make this ride go backwards? Draw a diagram to help you explain.
17First sketch the roller coaster that you chose (you may use one of the examples or create your own)Circle and label where there will be potential energy, repeat for kineticMake sure there are no stop heightsDetermine how the ride slows down safelySet reasonable heights to calculate the velocity that riders will be going at 4 points
18Label where riders are going a constant rate. Label 2 places where riders are speeding up.Describe the forces which cause the ride to gain energy and speed up.Label 2 places where riders are slowing down.Describe the forces which cause the ride to lose energy and slow down.Explain the places where energy is transformed.
19Synthesis:Something creative…A drawing, a diagram, a question, a sentence that represents your thinking from this class period.