PHYS 1240 Lecture Notes - Lecture 3: Tuning Fork
4 Sep 2018
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Document Summary
Periodic motion- repeats itself at regular intervals f = frequency = 1/period (cycles per second) Complex periodic motion = repeats itself, but is shaped differently than a sin wave. The shape of the wave determines the quality of the sound- which is why different instruments sound different even though they may be playing the same note. Clicker question 1: a tuning fork has complex periodic motion that repeats itself every . 001 seconds. What is its frequency: 10 hz, 100 hz, 1000 hz, 10,000 hz. Clicker question 2: what object is an example of simple harmonic motion: pendulum at large amplitudes, mass on a spring at small amplitudes, a vibrating guitar string, none. Clicker question 3: if we double the period what happens to the pitch: go up by a factor of 4, go up by a factor of 2, the pitch would not change, the pitch would go down.
