Doppler Effect (2 moving objects)

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SUMMARY

The discussion focuses on the Doppler Effect as it pertains to two moving objects, specifically a motorcycle and a siren. The key equation used is the frequency of the observer = frequency of source[(V ± Vo) / (V ± Vs)], which illustrates how the observed frequency is influenced by the velocities of both the source and the observer. It is established that while the siren's frequency remains constant, the frequency perceived by the motorcyclist varies based on their relative velocities. Understanding this relationship is crucial for accurately applying the Doppler Effect in practical scenarios.

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  • Understanding of the Doppler Effect
  • Familiarity with the equation for frequency shifts
  • Basic knowledge of sound wave properties
  • Concept of relative motion in physics
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  • Study the derivation of the Doppler Effect equation
  • Explore applications of the Doppler Effect in real-world scenarios
  • Learn about sound wave propagation and its characteristics
  • Investigate the impact of different velocities on frequency shifts
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Students studying physics, educators teaching wave mechanics, and anyone interested in the practical applications of the Doppler Effect in fields such as acoustics and astronomy.

lc99
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Homework Statement


upload_2018-3-7_23-38-48.png


Homework Equations



frequency of observer = frequency of source[(V +- Vo ) / (V-+Vs)]

The Attempt at a Solution


I am not completely understanding this question. I kinda understand that the frequency of the siren does not depend on the distance between the motorcycle and the siren. But, how does it depend on velocity? [/B]
 

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lc99 said:

Homework Statement


View attachment 221628

Homework Equations



frequency of observer = frequency of source[(V +- Vo ) / (V-+Vs)]

The Attempt at a Solution


I am not completely understanding this question. I kinda understand that the frequency of the siren does not depend on the distance between the motorcycle and the siren. But, how does it depend on velocity? [/B]

The siren is the source, its frequency is given and it does not depend on the velocities. But the frequency of the sound observed by the motorcyclist depends on both the velocity of the source Vs, and the velocity of the observer (Vr).
 
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