A source of sound is travelling towards a stationary observer. The frequency of sound heard by the observer is of three times the original frequency. The velocity of sound is v m/s. The speed of sourc

Question

A source of sound is travelling towards a stationary observer. The frequency of sound heard by the observer is of three times the original frequency. The velocity of sound is $v$ m/s. The speed of source will be:

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Answer:

A

Solution:

$f' = f \frac{v}{v - v _{s}} = 3 f$ gives $v - v_{s} = v /3$ , so $v_{s} = 2 v /3$ .

TestHub · Accepted Answer

f ′ = f v − v s ​ v ​ = 3 f gives v − v s ​ = v /3 , so v s ​ = 2 v /3 .

Physics - Sound Wave Question with Solution | TestHub

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