Physics 8.03 Vibrations and Waves

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Presentation transcript:

Physics 8.03 Vibrations and Waves Lecture 2

Announcements for today Pick up take-home experiment kits this week Where: Room 4-335 When: Today between 2 and 4pm Tuesday, Feb. 10 between 10am and noon Tuesday, Feb. 10 between 2 and 4pm Take-home experiments manual posted

Problem Set #1 Problem Set #1 posted on web site GET NEW VERSION What’s on it? Three problems on complex notation and superposition Three on simple harmonic oscillators One on damped harmonic oscillator (Need to make a matlab plot)

More organizational things Text books Vibrations and Waves, by French (required) Nearly every page used in 8.03 EM vibrations, waves and radiation, by Bekefi and Barrett (required) Lots of jumping around, pay attention to reading assignments Optics, by Hecht (recommended) Useful for Polarization, Interference, Diffraction

More organizational things Grades and recitation sections on the web Part of a pilot system of web-based grade database Activated Anonymous (or otherwise) feedback I will respond  be constructive I will post your comments (anonymously) along with my response  avoid profanity

Last time: Simple harmonic motion Equation of Motion Solutions in three forms Quadratic potential  SHM

Today: DAMPED HARMONIC MOTION Finish up simple harmonic motion Conservative forces, quadratic potentials and SHM Approximate SHOs: the pendulum Add damping term to equation of motion Solutions depend on size of the damping Lightly damped (under-damping) Heavily damped (over-damping) Critically damped