PHY 102 1nd Edition Lecture 9 Outline of Last Lecture I Kinematics Outline of Current Lecture I Blue Book II Motion III Wood block experiment IV Galileo s first law of motion Current Lecture I II III Blue 4 2 1 2 5 Motion has been studied since ancient times a Aristotle discusses motion in his book Physics i All moving objects are being pushed or pulled 1 Proven completely wrong b Almost everything Aristotle says about motion is wrong based not on experimental observation but on philosophical argumentation Wood block experiment a Galileo father of modern science b If you want to study motion start with simple and specific examples like a block sliding down an incline i The smoother the surface the smaller the angle ii Extrapolation by doing a finite number of experiments you can kind of figure out the outcome of another piece of the experiment c Underdetermination infinite theories and each theory is as valid as the other s i 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 good ii Implies there is no good theory and all theories are good iii The truth of no theory or statement can be determined d There is a more important scientific thought process an extrapolation it is called idealization 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 IV i Wood block experiment What angle corresponds to an infinitely smooth surface 0 degrees Galileo s first law of motion i On an infinitely smooth horizontal surface an object needs no push or pull to move
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