{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lecture 24

# Lecture 24 - Lecture 24 pls-24.1 Damped and Driven Harmonic...

This preview shows pages 1–3. Sign up to view the full content.

Lecture 24 pls-24.1 Damped and Driven Harmonic Motion Media: 1. Block on spring, rubber band / equipment to measure motion 2. Resonance Demos A. tuning fork near tuned Helmholtz resonator B. hoop on shaker C. Chladni plates D. organ pipes E. membrane pipes F. rotating tubes G. singing pipes H. Tacoma Narrows Bridge video Clicker questions 1 and 2. 1. Harmonic Oscillator N’s 2nd for harmonic oscillator: x k ma = Motion is harmonic: ( ) ( ) t A x t x eq ω cos = T f π π ω 2 2 = = spring force = net F 0 eq x k m x + no friction or drag angular frequency frequency period: time for the motion to repeat amplitude

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Lecture 24 pls-24.2 2. Damped Harmonic Oscillator (DHO) The DHO is an HO with a dissipative force v b (linear drag) added in. (A dissipative force is any force that converts (coherent) mechanical energy ME into (incoherent) internal energy associated with the motion of atoms. Kinetic friction is one such force.) For a block on a spring, this dissipative force is due to internal friction inside the spring.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 4

Lecture 24 - Lecture 24 pls-24.1 Damped and Driven Harmonic...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online