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  • Two vehicles, each with moving u on the same horizontal straight road, are approaching each other. Wind blows along the road with velocity. One of these vehicles blows a whistle of frequency <img a

Two vehicles, each with moving u on the same horizontal straight road, are approaching each other. Wind blows along the road with velocity. One of these vehicles blows a whistle of frequency f_{1}. An observer in the other vehicles hears the frequency of the whistle to be f_{2}. Correct statement is  

Option: 1

f_2>f_1


Option: 2

f_2<f_1


Option: 3

f_2=f_1


Option: 4

f_2 \neq f_1


Answers (1)

best_answer

When wind blows from O to S

\begin{aligned} &f_2=f_1\left(\frac{v-w+u}{v-w-u}\right)\\ &f_2>f_1 \end{aligned}

Option (a) correct

Posted by

shivangi.shekhar

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