Two cars, one in the front of the other, are traveling down the highwa

1.	Two cars, one in the front of the other, are traveling down the highway at 25 m/s. The car behind sounds it's own horn, which has a frequency of 500Hz. What is the frequency heard by the driver of the lead car? (Sound = 340 m/s)
Answer» According to doppler effect, f' \(=(\frac{\nu+\nu_0}{\nu-\nu_0})f\) where f = real frequency = 500 Hz f' = apparent frequency \(\nu\) = 340 m/s \(\nu_0\) = 25 m/s f' \(=(\frac{340+25}{340-25})\times500\) f' = 365/315 x 500 f' = 579.365 Hz

Two cars, one in the front of the other, are traveling down the highway at 25 m/s. The car behind sounds it's own horn, which has a frequency of 500Hz. What is the frequency heard by the driver of the lead car? (Sound = 340 m/s)

Answer»

According to doppler effect,

f' \(=(\frac{\nu+\nu_0}{\nu-\nu_0})f\)

where f = real frequency = 500 Hz

f' = apparent frequency

\(\nu\) = 340 m/s

\(\nu_0\) = 25 m/s

f' \(=(\frac{340+25}{340-25})\times500\)

f' = 365/315 x 500

f' = 579.365 Hz

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Two cars, one in the front of the other, are traveling down the highway at 25 m/s. The car behind sounds it's own horn, which has a frequency of 500Hz. What is the frequency heard by the driver of the lead car? (Sound = 340 m/s)

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