ch01 notes wo animations.pdf - 8/29/19 Physics Ch...

This preview shows page 1 - 5 out of 21 pages.

8/29/191PhysicsCh 1:Concepts of Motion GoalsModelsDescribing Motion & VectorsoUsing diagrams, graphs, picturesoKey quantities that describe motion§Time, Distance/Displacement, Speed/Velocity, AccelerationPhysics problem solving strategiesSI unit system & ConversionScientific Notation & prefixesInterpreting DataoPrecision & uncertaintyPhysicsMost fundamental of all natural sciencesDeals with structure & behavior of matterConcerned with discovery of fundamental laws of nature (describable in mathematical terms) & application of these laws to detailed study of all physical phenomenao1061 covers Mechanics & Oscillations
8/29/192Historical“Astronomy was first science EVERYWHEREoWhere are we? When is it? How/Why?1600s — Galileo & Newton — Mechanics1700s-1800s — Thompson, Day, Joule — Heat1800s — Maxwell — ElectricityEarly to mid 1900s — Einstein, Schrödinger, Dirac, etc — QMMid 1900s to present— various — lasers, supercond, fusion, fission, semiconductors, chaos, black holes, Higgs, dark matter, dark energy, exoplanets, quantum computingMachu Picchu Winter SolsticeEclipse 2017
8/29/193Galileo PrincipleRecognize scientific problem exists;State hypothesis: educated guess about problem;Predict consequences of hypothesis;Perform experiments or make observations to see if predictions occur;Formulate simplest general rule that organizes hypothesis, predictions & experimental results into theory.Models and TheoriesWhat is Science?Models and Theories“All of Physics is either impossible or trivial. It is impossible until you understand it, and then it becomes trivial.”— Sir Ernest RutherfordOnce someone (Newton, Einstein, you?) isolates simples laws from complex systems they are understandable
8/29/194Word Problems – Set UpRead problem first to see what are you looking forRead each phrase to determine what quantities are given or implied & what sort of thing they measureoNot just number, but what sortof thing is itDecide whether you need to convertunitsWhat relevant model(s)are applicableWord Problems – SolvingSketchthe problemChoose useful coordinate systemoUseful meaning that it alignswith some aspect of the physics that is going onWrite the problem algebraically using symbols both for knowns and unknowns Solve algebraically for each quantity before putting in numbersWord Problems – CheckingKeep extra sig fig for intermediate values, but round off final answer to correct # sig figMake sure you list units and signCheck for reasonablenessoNot crazy big, small, sign, direction, etc.

Upload your study docs or become a

Course Hero member to access this document

Upload your study docs or become a

Course Hero member to access this document

End of preview. Want to read all 21 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Fall
Professor
N/A
Tags
Velocity

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture