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Brut [27]
3 years ago
10

A galloping pony speeds past you at 5 m/s. The frequency of the sound produced by the hooves on the dirt is 221 Hz. Assume the s

peed of sound to be 342 m/s. What is the observed frequency of the hooves after the pony has passed your position?
1. 218 Hz
2. 226 Hz
3. 216 Hz
4. 224 Hz
Physics
2 answers:
kow [346]3 years ago
7 0
Given:
speed of passing pony 5 m/s
frequency of the sound produced: 221 Hz
speed of sound 342 m/s

Let us use the Doppler Shift Formula:
Where the <span>source is moving away from the observer at rest
</span>
f' = (v / v+vs) f
Where, vs<span> = Velocity of the Source,</span>
           v = Velocity of sound or light in medium,
           f = Real frequency,
           f' = Apparent frequency.

f'= [342 m/s / (342 m/s+5m/s)] * 221 Hz
f' = 0.9856 * 221Hz
f' = 217.8176 Hz or 218 Hz

The observed frequency <span>of the hooves after the pony has passed your position is 218 Hz.</span>
Studentka2010 [4]3 years ago
7 0
The answer is A) 218 Hz
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