PHY 101 1nd Edition Lecture 3 Chapter 1 Introduction Continued II Dimensional Analysis III Coordinate Systems a Cartesian Coordinates b Polar Coordinates IV Trigonometry a Pythagorean Theorem Chapter 2 Motion in One Dimension V Definitions VI Kinematics VII Displacement Current 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 the o Scalar Only have magnitude not direction can be positive or negative o For one dimensional motion signs will indicate direction 2 1 Displacement Displacement change in position o Need a reference point can use coordinate axes o Initial position xi o Final position xf o Displacement final initial x xf xi These 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 x xf xi 52m 30m 22m in the positive direction o Ex If xi 38 m and xf 53 m what is the displacement x xf xi 53m 38m 91m in the negative direction
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