PHY 101 1nd Edition Lecture 3 Chapter 1 Introduction ContinuedII. Dimensional AnalysisIII. Coordinate Systemsa. Cartesian Coordinatesb. Polar CoordinatesIV. Trigonometrya. Pythagorean TheoremChapter 2: Motion in One DimensionV. DefinitionsVI. KinematicsVII. DisplacementCurrent Lecture- Mechanics: study of motion- Kinematics: description of motion without concerning its cause- Dynamics: study the cause of the motion and the consequences- Galileo Galilei:o Carried out the first quantitative study of motion based on experiment- Kinematics:o Concepts/quantities Displacement, velocity, acceleration (THESE ARE VECTOR QUANTITIES)o Vector: Have both magnitude and direction Vectors are usually denoted by arrows above theo Scalar: Only have magnitude, not direction (can be positive or negative)o For one dimensional motion, +/- signs will indicate direction2.1 Displacement- Displacement: change in positiono Need a reference point, can use coordinate axeso Initial position = xio Final position = xfo Displacement = final – initial = Δx = xf – xiThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.o Ex. If xf = 52m and xi = 30m, what is the displacement?Δx = xf – xi= 52m – 30m=22m ( in the positive direction)o Ex. If xi = 38 m and xf = -53 m, what is the displacement?Δx = xf – xi=-53m – 38m=-91m ( in the negative
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