PHY 102 1nd Edition Lecture 9Outline of Last Lecture I. KinematicsOutline of Current Lecture I. Blue BookII. MotionIII. Wood block experimentIV. Galileo’s first law of motionCurrent LectureI. Blue 4.2 #1, 2, 5II. Motion has been studied since ancient timesa. Aristotle discusses motion in his book, Physicsi. “All moving objects are being pushed or pulled”1. Proven completely wrongb. Almost everything Aristotle says about motion is wrong (based not on experimental observation, but on philosophical argumentation)III. Wood block experimenta. Galileo = father of modern scienceb. “If you want to study motion, start with simple and specific examples, like a blocksliding down an incline”i. The smoother the surface, the smaller the angleii. Extrapolation = by doing a finite number of experiments, you can kind of figure out the outcome of another piece of the experimentc. Underdetermination = infinite theories and each theory is as valid as the other’si. No matter how many experimental confirmation of a theory you have, the philosophers say, we can come up with many other alternative theories that are just as goodii. Implies there is no good theory and all theories are goodiii. The truth of no theory or statement can be determinedd. There is a more important scientific thought process an extrapolation, it is called idealizationThese 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.i. Wood block experiment --> What angle corresponds to an infinitely smooth surface? 0 degreesIV. Galileo’s first law of motioni. On an infinitely smooth, horizontal surface, an object needs no push or pull to
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