Need help with a Physics problem to solve for frequency

Physics
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A driver travels northbound on a highway at a speed of 25.0 m/s. A police car, traveling southbound at a speed of 40.0 m/s, approaches with its siren producing sound at a frequency of 2500 Hz. (a) What frequency does the driver observe as the police car approaches? (b) What frequency does the driver detect after the police car passes him? (c) Repeat parts (a) and (b) for the case when the police car is behind the driver and travels northbound.

Nov 20th, 2015

Thank you for the opportunity to help you with your question!

a) f '' = vs vs − vpolice vs + vdriver vs f = vs + vdriver vs − vpolice f = (343 + 25) / (343 − 40) * 2500 Hz = 3036.3 Hz

b) f '' = vs vs + vpolice vs − vdriver vs f = vs − vdriver vs + vpolice f = (343 − 25) / (343 + 40) * 2500 Hz = 2075.7 Hz

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Nov 20th, 2015

What about c?


Nov 20th, 2015

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