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Lecture 1 - /B Lecture1:SHMReviewand IntroductiontoWaves...

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Physics 7C Spring 2011 Sections A/B Lecture 1: SHM Review and  Introduction to Waves Daria Eiteneer [email protected]
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Agenda Introduction Course Overview Simple Harmonic Motion Review Introduction to Waves
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Daria Eiteneer [email protected] Website: https://smartsite.ucdavis.edu My Office Hours: Tue 2-3pm in Roessler 166
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Clicker Setup: Joining Class 1) Turn on your clicker 2) If it doesn’t scan automatically, hit enter (green button) 3) Find PHY7C; hit enter 4) Display reads “ANS: PHY7C;” hit enter 5) When you’ve successfully joined, display reads “ANS: Wait for Q”
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Course Overview Wave Model Simple Harmonic Waves in 1, 2 and 3 dimensions Superposition of Waves Ray Model Reflection and Refraction Applications to Lenses Field Model Electric Fields Magnetic Fields Quantum Mechanics
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Simple Harmonic Motion (SHM)  Review For an object to undergo SHM, there must be 1) An Equilibrium position: the position at which the net force acting on the object is zero 2) A linear Restoring Force : force acting on the object is always pointing towards equilibrium and has a magnitude which is proportional to the distance from equilibrium → F = -k x
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SHM Review (cont’d) SHM constructs Amplitude (A) : maximum distance of object from equilibrium Period (T) : amount of time needed for object to complete one full cycle Frequency (f) : number of cycles per unit time Equilibrium position (y 0 ) : Position where the force on the object is zero Displacement (y) : position of the object with respect to equilibrium Fixed phase constant (φ) : Constant angle which allows us to specify initial position and initial velocity of object
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Graphical Representation of SHM 1 2 3 5 4 6 7 In this image, which of the numbers, if any, correspond to…….. Displacement?
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