Physics 1010: The Physics ofEveryday LifeMissed class on Tuesday?1) Don’t miss class again!2) All lectures are onlinehttp://www.colorado.edu/physics/phys1010TODAY• Clickers, groups• Motion in one dimension2Learning Assistants• Joseph [email protected]• Shaun [email protected]• Adam Sotkin (Tuesday lecture only)[email protected] will help with clicker questions, hold tutorial hours in Physics Tutorial Rooms3Clickers• Registered yet?• Let’s try them:4WHY AM I TAKING THIS @&% COURSE?a) Fulfill core requirementsb) Did not want to take chemistryc) Enjoy physicsd) Prepare to take “real” physicse) No labClicker Test-1Teams of 3; get together with two of your neighboursIntroduce yourselves, find out why they are taking this course5WHY DO WE USE CLICKERS?a) Reinforce class materialb) Coerse students into classc) Take more money!!!d) So instructor can see if students followmateriale) Easier to gradeClicker Test-26HOW IS LEARNING IN GROUPS DIFFERENTTHAN OTHER KINDS OF LEARNING?a) You have to communicate in a groupb) So you can get a different perspectivec) Help develop social skillsd) Helps you get a more complete answere) Get somebody else to do the work!Clicker Test-37Surveys1) Attitudes survey (Prof. Perkins)http://cosmos.colorado.edu/phet/survey/CLASSfa06/CLASSfa06-physics-1010.html2) In-class surveys8Motion in One DimensionGeometrical position can be denoted by arithmetic value(Rene Descartes, 1596-1650; Cartesian coordinates)Allows arithmetic and algebraic manipulation of geometrical concepts;Analytic geometryGraphs and formulae are alternate representations of the same concept0feet10-109Human Motion (& using graphs)Sketch distance (position) vs. time graph for1) Person moving away from origin (motion detector) at steady velocity on left.2) Person moving toward origin (mot. det.) at steady velocity on right.position+0-positiontime+0-time10feet20010Human MotionSketch distance (position) vs. time graph for1) Person moving away from origin(motion detector) at steady velocity on left.2) Person moving toward origin(mot. det.) at steady velocity on right.positionposition+0-time+0-timepositionposition+0-time+0-timepositionposition+0-time+0-timepositionposition+0-time+0-timeABCD11Human MotionSketch distance (position) vs. time graph for1) Person moving away from origin (motion detector) at steady velocity on left.2) Person moving toward origin (mot. det.) at steady velocity on right.position+0-positiontime+0-timeAnswer is Cawaytoward10feet20012Homework• All homework will be available online onWebCT• Homework #1 will be posted Monday, 9/4, atmidnight.• It will be due a week later (Monday, 9/11) atmidnight.• HW grader: Jing Yin,([email protected])13Summary• Position along a line can be denoted by anumber (Cartesian coordinate)• Position, velocity are vectors (havemagnitude AND direction)• Velocity = Change in position divided byelapsed time• Must select which direction is positive• Register with clicker
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