Oscillations & Waves

Oscillations & Waves

1. Elastic Potential Energy

   • A compressed spring has PE
   • Transforming spring PE into object's KE
   • PE_s = 1/2kx_2

2. Hooke's Law

   • Vibrational motion of an object attached to a spring
   • F_s = -kx
   • Force acts toward the equilibrium position
     • Restoring force

3. Simple Harmonic Motion

   • Motion of the spring, Mass System
   • The net force along the direction of motion
     • Obey Hooke's Law
   • F = -kx = ma

4. Uniform Circular Motion

   • Turntable rotates with a constant angular speed
   • Period
   • Frequency
   • Angular Frequency

5. Motion Pendulum

   • Simple Pendulum
     • F_t = -mg sin?
     • Period
   • Physical Pendulum
     • Period

6. Damped Oscillations

   • Only ideal systems oscillate indefinitely, friction retards the motion
   • Critically damped Overdamped Underdamped

7. Wave Motion

   • Types of Waves
     • Travelling waves
     • Transverse
     • Longitudinal
   • Speed of Wave
     • Stretched under tension, F
   • Interference of Waves
     • Constructive
     • Destructive
     • Reflection

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