202 - Lab 2 Wave Speeds Report_Vanessa Barahona.docx - 216...

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216PHY 202Lab 02 - Slinky Wave SpeedsA matter wave is different from a moving particle because it is a temporary disturbance that moves through amedium such as a spring, water, or a metal bar. The disturbance can move between two locations without thematter between the locations.Transverse and Longitudinal Waves: In this activity you’ll be considering disturbances that move along aSlinky that is stretched and then fixed at each end. There are two types of disturbances that can travel along astretched Slinky: [1] A few coils at one end can be pulled quickly in a direction that is perpendicular ortransverseto the line of stretched coils and released; or [2] A few coils at one end can be bunched together in alongitudinaldirection along the line of stretched coils and released. Video frames of each type of disturbanceare shown in Figures 1a and 1b and Figures 2a and 2b.Figure 1a: A single frame showing a transversedisturbance moving along a stretched Slinky.Figure 2a: A single frame showing a longitudinaldisturbance moving along a stretched Slinky.Figure 1b: A single frame showing that the transversedisturbance has moved about 1/2 meter in 1/8thof asecond.Figure 2b: A single frame showing that the transversedisturbance has moved about ½ meter in 1/8thof asecond.Your task in this assignment is to study movies that show transverse and longitudinal disturbances movingalong a stretched Slinky lying on a very slick (low friction) floor. What happens when just a few coils aredisturbed in a deliberate manner and released? You’ll be asked to think about the process by which thedisturbances propagate along the Slinky, measure the wave speeds, and consider what properties of the Slinkywill affect the speed of the waves.Before starting this activity, you should view the “slow-mo” versions of the transverse and longitudinalQuickTime movies entitled<SlinkyWave_T01(slow-mo).mov>and<SlinkyWave_L10(slow-mo).mov>.Notes about the Movies:The waves on this Slinky are moving at a rate of over 4 m/s, so we used a high speedvideo camera to record the motion at 125 frames per second (fps). We have created two sets of movies to enableyou to observe and analyze Slinky waves. One set of movies shows the frames being replayed in “slow-mo” atonly 15 fps so you can observe the motion. The other set can be used for analysis using the LoggerProsoftware. They are labeled “hi-speed”.Physics with Video Analysis

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Term
Fall
Professor
N/A
Tags
Transverse wave, Longitudinal wave, Wave mechanics, vw

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