1. Waves

2. Simple Harmonic Motion  periodic motion - a motion that ________itself again and again along the same path  simple harmonic motion (SHM) - a motion that is periodic, but also can be described by _______________(sines, cosines)  force is _______________

3. Example Pendulum  displacement - directed distance of object from its _______________position  amplitude (A) - ___________displacement from equilibrium  period (T) - period of SHM in ___________  frequency ( f ) - number of ___________per second

4. Equations of Motion in SHM  Period of an object oscillating on a spring:  Period of a simple pendulum:

5. Wave Motion  Waves result from a disturbance, the source of the wave  Mechanical waves propagate through a ______________(air, metal, Earth)  __________________________waves do not require a medium  When a medium is disturbed, ___________is imparted to it  A regular, rhythmic _______________in both time and space is called a wave, and the transfer of energy is said to take place by means of ______________________.  If the disturbance originates from a ___________________source, a periodic wave is generated.

6. Wave Motion  Wave Characteristics  _________________(A) – Magnitude of maximum displacement from the equilibrium position  Wavelength (λ) – ____________________between two successive crests (or troughs)  Wave speed: or

7. Types of Waves  __________________Waves  Motion of particles is __________________to the velocity  Can only travel through ______________  Longitudinal Waves  Motion of particles is _______________to the velocity  Can travel through solids, liquids and gasses

8. Wave Properties  When two or more waves encounter each other in the same medium they are said to _________________  Two types of interference:  _____________Interference

9. Wave Properties  Constructive Interference  Destructive Interference  Constructive Interference