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# Doppler Effect Problems - PowerPoint PPT Presentation

Doppler Effect Problems. f ’ = f ( V sound +/- V detector )/ ( V sound +/- V source ) Step 1: Identify and label all the variables. Step 2: Solve for the variable you are trying to find. Step 3: V detector is (+) if the detector moves towards the source.

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## PowerPoint Slideshow about 'Doppler Effect Problems' - gautam

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Presentation Transcript

### Doppler Effect Problems

f’ = f (Vsound +/- Vdetector)/ (Vsound +/- Vsource)

Step 1: Identify and label all the variables.

Step 2: Solve for the variable you are trying to find.

Step 3: Vdetectoris (+) if the detector moves towards the source.

Step 4: Vsource is (-) if the source moves towards the detector.

Step 5: Plug N Chug ( with units).

Step 6: Does the answer make sense?

### Doppler Effect Challenge

At a NASCAR race, a speeding car approaches Sally, who is in the stands, at a speed of 40 m/s. Sally gets up to go to the concession stand, and briskly walks at 2 m/s in a direction away from the speeding car. The driver of the car (the source) hears a sound of 2000Hz. What frequency does she perceive?

### Doppler Effect Challenge

At a NASCAR race, a speeding car approaches Sally, who is in the stands, at a speed of 40 m/s. Sally gets up to go to the concession stand, and briskly walks at 2 m/s in a direction away from the speeding car. The driver of the car (the source) hears a sound of 2000Hz. What frequency does she perceive?