Slide 1Slide 2Slide 3Slide 4Slide 5Slide 6Slide 7Slide 8Slide 9Slide 10Slide 11Slide 12Slide 13Slide 14Slide 15Slide 16Slide 17Slide 18Slide 19Slide 20Slide 21In BriefIntroductionSyllabusPhysics 1111K12Address: Learning by doing Learn how to learnPhilosophy:You must construct your own understanding.A gift to you all: An Ancient Chinese Proverb says:I hear, I forget. I see, I remember. I do, I understand.ReviewingRepeatingConnecting3Probing nature with experiments, Physicists try to find basic principles, usually stated as mathematical models that explain as economically as possible the phenomena they encounter.What is Physics? The dictionary definition of physics is “the study of matter, energy, and the interaction between them”http://www.physics.org/article-questions.asp?id=18Syllabus Available on Desire2LearnTextbook: College Physics by Knight, Field, & Jones with Student Workbook , Volume I, 2nd edition. I want you all to succeed in this course and will be happy to work with you to make that happen. Task WeightTests (3) 25%Final Exam 18%Quizzes & Worksheets 15%MP HomeworkID: MPWANGSP2014TR9/1117%Laboratories 25%Attendance (Bonus) 3%Break-points+ -A 97-100 93-96 90-92B 87-89 83-86 80-82C 77-79 73-76 70-72D 67-69 63-66 60-62F 0-594Bring your text book and Student Workbook in each of classes!Last day to withdraw: Mar. 4th Final Exam: May 1st 08:00-10:30AM (9:30AM class) 10:45AM-13:15 PM (11:00AM class)5Food and drinks are not allowed, cell phones should remain OFF, laptop computers are allowed to use for taking class notes only during class. You are expected to behave properly in the classroom without disruption to student learning. Late submissions of Mastering physics homework will cost student 3% of the grade/day, a maximum penalty of 30%. Students are expected to attend each of classes. Quizzes and exams are individual work and to be done WITHOUT help from othersThere are no make-up quizzes and tests. Worksheets after one week of the due day will not be accepted.PHYS 1111K—Road MapMechanics, Heat, and Wave motionPart -I Force and MotionCh.1 Representing MotionCh.2 Motion in One DimensionCh.3 Vectors and Motion in Two-DimensionCh.4 Forces and Newton’s Laws of MotionCh.5 Applying Newton’s LawsCh.6 Circular Motion, Orbits and GravityCh.7 Rotational MotionCh.8 Equilibrium and ElasticityPart -II Conservation LawsCh.9 MomentumCh.10 Energy and WorkCh.11 Using EnergyPart-III Properties of MatterCh.12 Thermal Properties of MatterCh.13 FluidsPart-IV Oscillations and WaveCh.14 OscillationsCh.15 Traveling Waves and SoundCh.16 Superposition and Standing WavesHow…? Kinematics Why…? Dynamics6Motion: The change of an object’s position or orientation with timeAs this snowboarder moves in a graceful arc through the air, the direction of his motion, and the distance between each of his positions and the next, is constantly changing. What are basic types of motion we will study in this book?7Three Types of Motion8Translation Rotation VibrationCh.1-5 Ch.6-8Ch.14-169Describe of motionMotion diagramsGraphsTablesEquationsPHYS 1111K—Chapter oneGoals: •Basic concept about Motion•Develop tools to help us to describe and understand the motion Topics:•Motion diagrams•The Particle model•Physical quantities •Scientific notation•Significant figures•SI Units•Scalar and vectors10Physical quantities:•Position and time•Distance •Displacement•Speed •Velocity•Acceleration•MassDefinition, notation and applicationA motion diagram is a composite image showing an object’s position at several equally spaced instants of time. 11Represent the position, velocity, and acceleration of an objectMore Examples of Motion Diagrams12A basketball free throw.A car is stopping for a red light.A stationary ball on the ground. A skateboard rolling down the sidewalk at a constant speed. A sprinter starting the 100-meter dash.The object is treated as if all its mass were concentrated at a single point called a particle. It helps us to concentrate on the overall motion of the object.The Particle Model13Redraw motion diagrams using the Particle Model1415What are you interested in when you try to describe/understand a motion?Where? Position, distance, and displacement How fast? Speed and velocityHow does a velocity change? AccelerationPosition and coordinate systemPosition: where is the location of the object. Reference point, direction and distance relative to the reference point Coordinate can be used to provide these pieces of informationA coordinate system: an origin point axes with scaledirection and unitFigure 1.7 The coordinate system used to describe objects along a country road.16One -dimensional coordinate system using an x-axisx (m)050100 150-50-100Stop to think 1.2 Three motion diagrams are shown. Which is a dust particle settling to the floor at constant speed, which is a ball dropped from the roof of a building, and which is a descending rocket slowing to make a soft landing on Mars?Checking Understanding1. Two runners jog along a track. The positions are shown at 1 s time intervals. Which runner is moving faster?182. Two runners jog along a track. The times at each position are shown. Which runner is moving faster?C. They are both moving at the same speed.Distance and Displacement, Speed and Velocity 19Distance is actual length of an object traveled regardless of its direction. A scalarDisplacement: is a change of position including the direction of motion.A vectorA displacement vector starts at an object’s initial position and ends at its final position. It doesn’t matter what the object did in between these two positions.The boat’s displacement is the straight line from its initial to its final position.DisplacementThe change in the position of an object as it moves from initial position xi to final position xf is its displacement ∆x = xf – xi.20Question: Sam is standing 50 feet (ft) east corner of 12th Street and Vine. He then walks to a second point 150 ft east of Vine. What is Sam’s displacement?In motion diagrams, the displacement vectors span successive particle positions.ftftftx10050150Before Wednesday:1. Review Chapter 1, sections 1, 2 and 3 Key Words: Motion diagram, Particle model, Coordinate systems,Position/distance2. Reading assignment: Chapter 1, sections 4 and 5 Scan 1.6 Key Words: Velocity/speed, Significant figures, Scientific notation, Units,