How Do Amplitude and Frequency Affect the Velocity of a Wave?

Wave Lab How do amplitude and frequency affect the velocity of a wave?

Hypothesis: Hypothesis: As amplitude increases, velocity will ______.

Hypothesis: As frequency increases, velocity will ______.

Background:

Go to https://phet.colorado.edu/sims/html/wave-on-a-string/latest/wave-on-a-string_en.html or phet.colorado.edu and search for “Wave on a String.”

Play: Try changing different aspects of the simulation.

Draw a picture of a wave with low amplitude: Draw a picture of a wave with high amplitude:

Draw a wave with low frequency: Draw a wave with high frequency:

How does damping affect the wave? How does tension affect the wave?

Watch just the green dots. How are they moving? Please provide a picture with a few words to explain. Experiment: -Click “oscillate”. -Click “slow motion”. -Choose “none” for damping. -Choose “high” for tension. -Turn on timer. -Place the reference line in place. -Click “no end.” ****You are counting the number of waves that pass through the window. Because each table has 4 waves, it is helpful to just count 4 crests that go through the window. You will have to run the clock to find the time.

The Effect of Amplitude on Time (and Velocity) Waves Amplitude Wavelength Frequency (Hz) Time (s) (cm) (cm) 4 0.5 2.2 1.5 4 0.5 2.2 1.5 4 0.5 2.2 1.5 Average:

Waves Amplitude Wavelength Frequency (Hz) Time (s) (cm) (cm) 4 1.25 2.2 1.5 4 1.25 2.2 1.5 4 1.25 2.2 1.5 Average:

Conclusion: As amplitude increases, velocity ______.

The Effect of Frequency on Time (and Velocity) Waves Amplitude Wavelength Frequency (Hz) Time (s) (cm) (cm) 4 1.25 2.2 1.5 4 1.25 2.2 1.5 4 1.25 2.2 1.5 Average:

Waves Amplitude Wavelength Frequency (Hz) Time (s) (cm) (cm) 4 1.25 2.2 3.0 4 1.25 2.2 3.0 4 1.25 2.2 3.0 Average:

Conclusion: As frequency increases, velocity ______.

Formula for Velocity of a Wave: