Test tomorrow please help

  • Thread starter BuBbLeS01
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Test tomorrow...please help!!!!

Homework Statement


A student in a parked car honks the horn, which has a `proper' frequency of 310.00 Hz. An observer in an approaching vehicle measures the frequency of the sound to be 342 Hz. Calculate the speed of the approaching vehicle. Use 340 m/s as the speed of sound in air.


Homework Equations





The Attempt at a Solution


Fs = 310 Hz
Fo = 342 Hz
Vo = 0 m/s
V = 340 m/s
Vs = ?

I know
Vs = (Fs - Fo / Fs + Fo) * V
if the object is going away from the observer
but how I do calculate if the object is approaching the person?
 

Answers and Replies

  • #2
Doc Al
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You already have a thread open on this same question. Use it.
 

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