Chapter 12Vibrations and Waves Section 2 Measuring simple harmonic motion
Amplitude, Period and Frequency • Period and frequency measure time. • f = 1/T • T = 1/ f • Amplitude measures displacement from equilibrium position. • The period of a simple pendulum depends on string length and free- fall acceleration.
Formula: Simple Pendulum Where: T = period L = length of string g = free – fall acceleration ( 9.81 m/s2)
Guided Practice • Open books to pg. 448 • Sample Problem 12B
Formula : Mass- Spring System • Period of a mass-spring system depends on mass and spring constant. Where : T = Period m = mass k = spring constant
Guided Practice • Open Books to pg. 450 • Sample Problem 12C