ACC PHYS 1401 - Energy Conservation (7 pages)

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Energy Conservation



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Energy Conservation

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Lecture Notes


Pages:
7
School:
Austin Community College District
Course:
Phys 1401 - General College Physics I

Unformatted text preview:

Energy Conservation Introduction As an object slides down a frictionless surface its Total Mechanical Energy ET remains constant even though its potential and kinetic energies change The purpose of this lab is to test the validity of the Conservation of Total Mechanical Energy Equipment Air Track Computer with Logger Pro Ring stand Miniature Glider Vernier Photogate Meter Stick Air Supply Vernier Lab Pro Scale Digital Table Jack Air Track Accessory Kit Theory The Total Mechanical Energy of an object remains constant in the absence of nonconservative forces This is called the Conservation of Total Mechanical Energy or sometimes just Energy Conservation for short This is a fundamental tenet of science and has extremely broad applications in all technical fields The two types of energy that will be under consideration in this laboratory experiment are the potential energy PE and the kinetic energy KE The object in this case will be a glider on an air track system There are two forces at work in this experiment gravity and friction The frictional forces have been minimized by the use of the air track system and will therefore be neglected in our analysis Gravity exerts a force on the glider and will contribute a gravitational potential 09e Energy Con Slope 1 17 09 1 energy GPE to the Total Mechanical Energy ET The normal force of the track pushing back on the glider is perpendicular to the direction of the glider motion and so will produce no work and will not affect ET Therefore in this experiment the Total Mechanical Energy consists only of the Kinetic Energy KE and the Gravitational Potential Energy GPE Since there are no non conservative forces acting on the glider its Total Mechanical Energy is conserved Terminology Gravitational Potential Energy GPE mgy Kinetic Energy KE mv2 Total Mechanical Energy ET KE GPE mv2 mgy General Procedure As the glider accelerates down the sloped air track you will make measurements of the glider s GPE and KE for five different



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