Chapter study guide

The pendulum is an example of an oscillator, which has motion that repeats in cycles with properties of frequency, period, and amplitude. Period and frequency are inversely related. Most oscillators have a natural frequency at which resonance occurs. The frequency and period of a simple pendulum depend on its length. An object oscillating vertically on a spring is another example of an oscillator, one whose frequency and period depend on the object’s mass and the spring constant.

By the end of this chapter you should be able to:
describe and measure period, frequency, and amplitude for a wave;
determine period, amplitude, and frequency from a graph;
calculate frequency and period from each other;
describe the meaning of resonance and provide examples;
explain the principles behind an oscillating pendulum and calculate its period; and
explain the principles behind a mass oscillating vertically on a spring and calculate its period.

14A: Oscillators
14B: Damping and shock absorbers
14C: Resonance

390Concepts of harmonic motion
391Why harmonic motion occurs
392Frequency and period
39314A: Oscillators
394Amplitude and energy
395The pendulum
396Mass and spring oscillator
39714B: Damping and shock absorbers
399Section 1 review
400Natural frequency and resonance
401Natural frequency of a pendulum
402Natural frequency of a mass and spring oscillator
40414C: Resonance
405Section 2 review
406Chapter review
f= 1 T
f= 1 2π k m
T=2π L g
frequencyhertz (Hz)amplitude
dampingphaseperiodic force

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