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University of South Florida, Tampa *

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7980

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Physics

Date

Apr 3, 2024

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docx

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2

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Wave on a String Simulation Using the simulation provided, follow the instructions below and answer all questions before submitting this document. 1. In the simulation, switch to "Oscillate". Play with the Amplitude in the bottom box. What do you see happen to the wave on the string when you increase the amplitude? As the amplitude increases, the wave oscillates more and more around the normal horizontal axis. 2. Play with the Frequency in the bottom box. What do you see happen when you increase the frequency? As the frequency increases, there are more crests and troughs created, creating more and more repeated waves. 3. Click on the Rulers button on the bottom box. Then set the amplitude and frequency to the numbers below. After the numbers are set, play the wave and pause it after 5 seconds. Measure the distance between the top of one wave to the next wave. Record that as the Wavelength. Amplitude Amplitude (cm) Frequency (Hz) Wavelength (cm) 1.25 2.05 3 1.25 3.00 2 0.75 2.05 3 4. Based off of Your Observations, create a definition for each of the terms below. (It might help if you draw a picture just for your own records) Amplitude- The maximum distance displaced by a point on a wave in a vertical sense. Frequency- The number of waves that pass a point in a certain amount of time. Wavelength- The distance in-between two individual crests within a wave. 5. Switch to "Manual". Change the speed from “normal” to “slow motion”. Move the wrench up and down and watch how the wave travels towards the clamp. In a couple of sentences describe what you see happening to the wave as it travels. As the wave travels, it responds to the up and down motion of wrench, which causes its amplitude to change depending on how far up or down the wrench is moved. The motion also runs through the entirety of the wave and comes to a halt at the end. 6. Now, turn the damping up to “lots” and move the wrench up and down. In a couple of sentences describe what you see happening to the wave as it travels down.
While the movement in the wrench still follows an up and down pattern, it does not move as much as it did when the damping was lesser. This causes a very bland pattern where the wave still happens, but there is no amplitude present. Instead, there is a flat line that experiences a slight curve up or down when the wrench is moved. 7. In your own words, describe what "damping" does to a wave. Damping restricts the motion of a wave by making an end of the wave a lot tighter and less reactive to motion.  
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