PHYS 1750: SELECTED TOPICS in PHYSICS
LECTURE 25. Wave Motion
| 15.4. | The Low-amplitude Pendulum | ||
| 1. | Fx = -mgsin(q) = -mgx / L | ||
| 2. | Fx = kx so k = mg / L | ||
| 3. | w = sqrt (k / m) = sqrt (g / L) | ||
| 4. |
Remember
w =2p/T; In SHM, both are independent of X, the amplitude | ||
| Another cute applet | |||
| 15.9. | What is a Wave? | ||
| 1. | Transmission of energy and momentum | ||
| 2. | Oscillating carrier material | ||
| 3. | Types of Waves | ||
| a. | Transverse: carrier motion perpendicular to wave motion | ||
| Restoring force: shear | |||
| Vibrating strings, S-waves, light | |||
| b. | Longitudinal: carrier motion parallel to wave motion | ||
| Restoring force: pressure | |||
| Sound, P-waves | |||
| c. | Surface waves: combination | ||
| Yet another cute applet | |||
Review Questions for SHM and Pendula
Lecture 26: The Wave Equation and Interference