1. Waves

2. https://www.youtube.com/watch?v=RVyHkV3 wIyk

3. Mechanical Waves Transfer energy without transferring matter
Needs a material to travel through
A moving particle slams into an adjacent particle, which slams into its adjacent particle which slams into its adjacent particle…
(think Newton’s Cradle)

4. Two Different Types
Transverse waves (S waves) – Particles vibrate in the opposite direction as the direction of travel.
Longitudinal waves (P waves)– Particles vibrate in the same direction as the direction of travel.

5. Transverse Wave

6. Longitudinal Waves (P waves)

8. Brightstorm Wavelength Brightstorm Period/frequency
Parts of a Wave
Crest – a point on a wave with a maximum value (or “upward” displacement)
Trough – A point on a wave with a minimum value (or “lowest” displacement)
Amplitude – the maximum distance the particles in a wave vibrate from their rest positions
Wavelength (λ) – length of one wave cycle
Brightstorm Wavelength
Brightstorm Period/frequency
Wave Simulation PHET

9. Label the part of the wave

10. Brightstorm Video until 2:20
Velocity (v) – How fast the wave is traveling.
Unit – meters/second
Period (T) – Time it takes to complete one cycle.
Frequency (f) – Number of complete cycles in one second.
Unit: Hz
Wave Velocity = Frequency x Wavelength
Brightstorm Video until 2:20

11. Practice Problems
A wave has a wavelength of 15m with a frequency of 0.5Hz. What is the velocity of the wave?
Wave Velocity = Frequency x Wavelength
Waves velocity = 0.5Hz. X 15m
Waves velocity = m
A wave has a wavelength of 10m with a frequency of 1.0Hz. What is the velocity of the wave?
10m/s
A wave is traveling at a velocity of 20m/s and has a wavelength of 10m. What is the frequency of the wave?
2Hz

12. Motion of Particles and types of waves video
Transverse
Longitudinal
Motion of Particles and types of waves video

13. Relationship Between Frequency and Wavelength
As the wavelength increases, the frequency decreases.
As the wavelength decreases, the frequency increases.