PHYS 376 Lecture Notes - Lecture 1: Linear Motion, International System Of Units
26 Jan 2017
School
Department
Course
Professor
Document Summary
Any machine produced follows the laws of nature and motion. Doesn"t need acceptance, truth comes from the universe as do the laws. Linear motion in one, two, and three dimensions. Mks: length - meters (m), mass - kilograms (k), time - seconds (s) Cgs: length - centimeters (c), mass - grams (g), time - seconds (s) British units: inches, feet, miles, pounds, slugs. We will mostly use si units, but we may come across british units so know how to convert. 1 mile = 5280 feet / 1. 61 kilometers. Scalar: only have size/magnitude. (how much, how many) Vector: size/magnitude and direction. (how fast, what direction) Average speed = total distance / total time. Vave = total distance / total time = change in distance / change in time = (vi + vf) Instantaneous speed or velocity: speed or velocity at a particular instant in time. A quick reading of your speedometer gives instantaneous value of your car"s speed.
