P7_Energy_Work_Intro

P7_Energy_Work_Intro - Energy and Work Recall Newtons laws Newtons 1st law constant velocity = no net force Newtons 2nd law F=m*a Newtons 3rd law

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Energy and Work
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Recall: Newton’s laws Newton’s 1 st law constant velocity = no net force Newton’s 2 nd law F = m * a Newton’s 3 rd law Action = Reaction E.g. for a rocket
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Energy You hear the word all the time… What is it?
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A cloudy definition… Energy is the stuff that makes things go ”… Where “ stuff and “ go need further explanation stuff is meant in an abstract way
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Everyday examples of Energy We need energy Where does it come from? Where does the energy in food come from?
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Everyday examples of Energy
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Where does the Energy of the Sun come from? Everyday examples of Energy
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Mechanical Energy U g U s K Thermal Energy E th Other forms include E chem E nuclear Slide 10-12 Everyday examples of Energy
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Energy Transformations E.g. Nuclear energy (in sun) Thermal energy (sun’s thermal energy) Solar energy (sun’s radiation) Chemical (food, gas, created by photosynthesis) Mechanical energy (kinetic, potential) Thermal energy (dissipation of kinetic energy)
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Energy Transformations Pendulum: Potential Energy Kinetic Energy Potential Energy slowly dissipated into Thermal Energy
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A more formal approach for what is “ stuff Whatever we define as
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This note was uploaded on 02/15/2012 for the course PHYSICS 200 taught by Professor Staff during the Fall '11 term at Syracuse.

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P7_Energy_Work_Intro - Energy and Work Recall Newtons laws Newtons 1st law constant velocity = no net force Newtons 2nd law F=m*a Newtons 3rd law

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