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Doppler Effect; Two Moving Objects 
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#1
Jan2512, 11:31 PM

P: 4

1. The problem statement, all variables and given/known data
Two automobiles are driving on the same road in opposite directions. The speed of the first automobile is 90.0 km/h and that of the second is 60 km/h. The horns of both automobiles emit tons of frequency 524 Hz. Calculate the frequency that the driver of each automobile hears coming from the other automobile. 2. Relevant equations Doppler Effect 1. For a Moving Source and Stationary Object f=fv/(vvsource) 3. The attempt at a solution Car one (90km/h) is moving 30 km/h toward the other. f=524*340/(34030) Answer {593Hz, 594Hz} 


#2
Jan2612, 08:21 AM

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P: 41,477

Both cars are moving with respect to the road (and air) towards each other. You also need to revise your formula, since both observer and source are moving. 


#3
Jan2612, 01:00 PM

P: 4

Wow nevermind that statement it would the cars would appear to be moving 150 km/h toward each other. But I'm still confused on how to setup the Doppler effect.



#4
Jan2612, 07:42 PM

Mentor
P: 41,477

Doppler Effect; Two Moving Objects



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